Our 'Authentication' tag archive is a treasure trove of knowledge for anyone looking to understand or improve their understanding of authentication. It's a critical aspect of any system that aims to protect user data. Our archive includes a wealth of articles and tutorials that cover everything from the basics of authentication to advanced techniques. Whether you're a beginner just starting out or an experienced developer looking for a refresher, our archive has something to offer. We cover a range of topics, including the importance of authentication, best practices to follow, and the latest trends in the industry. We also provide practical guides on how to implement authentication in various scenarios and platforms. Each article is written in an easy-to-understand manner, making complex concepts accessible to all. So, if you're looking to learn about authentication, you've come to the right place.

The Authentication tag archive includes a vast array of articles and tutorials that delve into the world of authentication, its significance, and how to implement it effectively.

Supabase

This tutorial aims to provide software developers with a comprehensive guide on getting started with Supabase. Supabase is an open-source Firebase alternative that offers a suite of tools for building scalable and secure applications. In this tutorial, we will cover the basics of Supabase, including setting up an account, database management, authentication, real-time subscriptions, API endpoints, deployment, and more.

![getting started supabase comprehensive tutorial](https://dopebase.com/media/cover13.jpg)
## Introduction

### What is Supabase?

Supabase is an open-source platform that combines the power of PostgreSQL and the simplicity of Firebase. It provides developers with a set of tools and services, including a database, authentication, real-time subscriptions, and API endpoints, to build scalable and secure applications.

### Why use Supabase?

Supabase offers several advantages for software developers. Firstly, it leverages the power of PostgreSQL, a popular and robust relational database management system. This ensures data integrity, scalability, and flexibility for your applications. Secondly, Supabase provides a suite of services that are commonly required in modern applications, such as user authentication, real-time subscriptions, and API endpoints. This eliminates the need for integrating multiple third-party services and simplifies the development process. Lastly, Supabase is open-source and self-hostable, giving you complete control over your data and infrastructure.

### Prerequisites

Before diving into Supabase, make sure you have the following prerequisites:

- Basic knowledge of SQL and relational databases.
- Familiarity with JavaScript and Node.js.
- An active internet connection.

## Setting Up Supabase

### Creating an Account

To get started with Supabase, you first need to create an account. Visit the [Supabase website](https://supabase.io/) and click on the "Get Started for Free" button. Fill in the required details, including your email address and a password, and click on the "Create Account" button. You will receive a confirmation email to verify your account.

### Creating a Project

Once you have created an account, you can create a new project in Supabase. Log in to your Supabase account and click on the "New Project" button. Enter a name for your project and choose a region for hosting your database. Click on the "Create Project" button to create your project.

### Configuring Supabase

After creating a project, you will be redirected to the project dashboard. Here, you can find your project URL, API URL, and API key. These credentials are required to connect to your Supabase database and make API requests. Make sure to securely store these credentials as they are sensitive.

To configure Supabase in your application, you need to install the Supabase client library. You can install it via npm by running the following command:

```bash
npm install @supabase/supabase-js
```

Once installed, you can initialize the Supabase client by providing your project URL and API key:

```javascript
import { createClient } from '@supabase/supabase-js';

const supabaseUrl = 'https://your-project-url.supabase.co';
const supabaseKey = 'your-api-key';
const supabase = createClient(supabaseUrl, supabaseKey);
```

With the Supabase client initialized, you are now ready to manage your database.

## Database Management

### Creating Tables

To create a table in Supabase, you can use the `supabase.createTable()` method. This method takes two arguments: the table name and an object representing the table schema. The schema defines the columns and their data types for the table.

```javascript
const { data, error } = await supabase.createTable('users', {
  id: {
    type: 'integer',
    primaryKey: true,
    notNull: true,
  },
  name: {
    type: 'text',
    notNull: true,
  },
  email: {
    type: 'text',
    notNull: true,
    unique: true,
  },
  createdAt: {
    type: 'timestamp',
    default: 'now()',
  },
});
```

In the above example, we create a table named "users" with four columns: "id", "name", "email", and "createdAt". The "id" column is defined as an integer primary key, while the "name" and "email" columns are defined as non-null text fields. The "createdAt" column is a timestamp with a default value of the current timestamp.

### Defining Relationships

Supabase supports defining relationships between tables using foreign keys. To define a foreign key relationship, you can use the `supabase.createTable()` method and the `references` property in the column definition.

```javascript
const { data, error } = await supabase.createTable('orders', {
  id: {
    type: 'integer',
    primaryKey: true,
    notNull: true,
  },
  userId: {
    type: 'integer',
    references: 'users',
  },
  totalAmount: {
    type: 'numeric',
    notNull: true,
  },
});
```

In the above example, we create a table named "orders" with three columns: "id", "userId", and "totalAmount". The "userId" column is defined as an integer and references the "users" table. This establishes a foreign key relationship between the "orders" and "users" tables.

### Performing CRUD Operations

Supabase provides a set of methods for performing CRUD (Create, Read, Update, Delete) operations on your database. Here are some examples:

#### Create

To insert a new row into a table, you can use the `supabase.insert()` method.

```javascript
const { data, error } = await supabase.from('users').insert([
  { name: 'John Doe', email: 'john@example.com' },
  { name: 'Jane Smith', email: 'jane@example.com' },
]);
```

In the above example, we insert two new rows into the "users" table.

#### Read

To fetch data from a table, you can use the `supabase.from()` method.

```javascript
const { data, error } = await supabase.from('users').select('*');
```

In the above example, we fetch all columns (`*`) from the "users" table.

#### Update

To update existing rows in a table, you can use the `supabase.update()` method.

```javascript
const { data, error } = await supabase
  .from('users')
  .update({ name: 'John Smith' })
  .eq('id', 1);
```

In the above example, we update the "name" column of the row with the ID of 1 in the "users" table.

#### Delete

To delete rows from a table, you can use the `supabase.delete()` method.

```javascript
const { data, error } = await supabase.from('users').delete().eq('id', 1);
```

In the above example, we delete the row with the ID of 1 from the "users" table.

## Authentication

### Setting Up Authentication

Supabase provides built-in authentication functionality to handle user registration, login, and session management. To enable authentication in your project, you need to configure the authentication providers and initialize the authentication client.

#### Configuring Providers

To configure authentication providers, navigate to the "Authentication" section in your project dashboard. Here, you can enable and configure various providers, such as email/password, Google, GitHub, and more. Follow the on-screen instructions for each provider to set up the required credentials.

#### Initializing the Authentication Client

To initialize the authentication client, you can use the `supabase.auth` object.

```javascript
const auth = supabase.auth;
```

With the authentication client initialized, you can now perform various authentication actions.

### User Registration

To allow users to register in your application, you can use the `auth.signUp()` method.

```javascript
const { user, error } = await auth.signUp({
  email: 'john@example.com',
  password: 'password123',
});
```

In the above example, we register a new user with the email "john@example.com" and the password "password123".

### User Login

To authenticate users in your application, you can use the `auth.signIn()` method.

```javascript
const { user, error } = await auth.signIn({
  email: 'john@example.com',
  password: 'password123',
});
```

In the above example, we authenticate the user with the email "john@example.com" and the password "password123".

## Real-time Subscriptions

### Enabling Real-time Subscriptions

Supabase provides real-time subscription functionality, allowing you to listen for changes in your database and receive updates in real-time. To enable real-time subscriptions, you need to configure the triggers and initialize the real-time client.

#### Configuring Triggers

To configure triggers, navigate to the "Database" section in your project dashboard and select the table for which you want to enable real-time subscriptions. Click on the "Triggers" tab and create a new trigger. You can define the trigger condition and the action to be performed when the condition is met.

#### Initializing the Real-time Client

To initialize the real-time client, you can use the `supabase.realtime` object.

```javascript
const realtime = supabase.realtime;
```

With the real-time client initialized, you can now listen for changes and handle real-time updates.

### Listening for Changes

To listen for changes in a table, you can use the `realtime.from()` method.

```javascript
const unsubscribe = realtime
  .from('users')
  .on('INSERT', (payload) => {
    console.log('New user inserted:', payload.new);
  })
  .subscribe();
```

In the above example, we listen for new rows (`INSERT`) in the "users" table. Whenever a new row is inserted, the callback function is invoked, and the new row data is logged to the console.

### Handling Real-time Updates

To handle real-time updates, you can use the appropriate callback functions based on the type of change (`INSERT`, `UPDATE`, `DELETE`).

```javascript
const unsubscribe = realtime
  .from('users')
  .on('*', (payload) => {
    console.log('Change occurred:', payload);
  })
  .subscribe();
```

In the above example, we listen for any change (`*`) in the "users" table. Whenever a change occurs, the callback function is invoked, and the change payload is logged to the console.

## API Endpoints

### Creating Custom API Endpoints

Supabase allows you to create custom API endpoints to perform server-side logic and interact with your database. To create a custom API endpoint, you can use the Supabase CLI or the Supabase Dashboard.

#### Supabase CLI

To create a custom API endpoint using the Supabase CLI, navigate to your project directory and run the following command:

```bash
supabase generate api my-endpoint
```

This will generate a new API endpoint in the `api` directory of your project. You can then implement your server-side logic in the generated files.

#### Supabase Dashboard

To create a custom API endpoint using the Supabase Dashboard, navigate to the "API" section in your project dashboard. Click on the "New Endpoint" button and enter a name for your endpoint. You can then define the route, HTTP methods, and serverless function code for your endpoint.

### Securing API Endpoints

Supabase allows you to secure your API endpoints using various authentication mechanisms, such as API keys, JWT tokens, or custom authentication logic. To secure an API endpoint, you can use the `supabase.auth.api()` method.

```javascript
const { data, error } = await supabase.auth.api('my-endpoint').get('/path');
```

In the above example, we secure the API endpoint named "my-endpoint" and make a GET request to the "/path" route.

### Testing API Endpoints

To test your API endpoints, you can use tools like cURL or Postman. Make sure to include the appropriate authentication headers or tokens when making API requests to secured endpoints.

```bash
curl -H 'Authorization: Bearer <api-key>' https://api.supabase.co/my-endpoint/path
```

In the above example, we make a cURL request to the "/path" route of the "my-endpoint" API endpoint, including the API key in the Authorization header.

## Deployment

### Deploying Supabase

To deploy Supabase, you can use the Supabase CLI or the Supabase Dashboard.

#### Supabase CLI

To deploy Supabase using the Supabase CLI, navigate to your project directory and run the following command:

```bash
supabase deploy
```

This will deploy your Supabase project to the Supabase hosting infrastructure.

#### Supabase Dashboard

To deploy Supabase using the Supabase Dashboard, navigate to the "Hosting" section in your project dashboard. Click on the "Deploy" button to deploy your project to the Supabase hosting infrastructure.

### Scaling Supabase

Supabase is designed to scale horizontally by adding more instances of the Supabase service. You can scale your Supabase project by upgrading your plan or contacting the Supabase team for custom scaling options.

### Monitoring and Maintenance

Supabase provides monitoring and maintenance tools to help you keep your application running smoothly. You can monitor your project's performance, view logs, and perform maintenance tasks using the Supabase Dashboard.

## Conclusion

In this tutorial, we covered the basics of getting started with Supabase. We learned how to set up a Supabase account, create a project, configure Supabase, manage the database, enable authentication, utilize real-time subscriptions, create custom API endpoints, deploy Supabase, and perform monitoring and maintenance tasks. With the knowledge gained from this tutorial, you are now equipped to build scalable and secure applications using Supabase. Explore the official Supabase documentation for more advanced features and capabilities. Happy coding!

Getting Started with Supabase: A Comprehensive Tutorial

React

In this tutorial, we will explore 10 best practices for ensuring the security of your React Native applications. React Native is a popular framework for building mobile applications using JavaScript and React. While React Native provides many benefits in terms of productivity and code reusability, it is important to pay close attention to security to protect user data and prevent potential vulnerabilities.

![react native security best practices](https://dopebase.com/media/cover12.jpg)
## Introduction

### What is React Native?

React Native is a JavaScript framework that allows developers to build mobile applications using React, a popular JavaScript library for building user interfaces. With React Native, developers can write code once and deploy it across different platforms such as iOS and Android. This makes it easier and more efficient to develop mobile applications, as developers can leverage their existing knowledge of React.

### Importance of Security in React Native

Security is a critical aspect of any software development project, and React Native applications are no exception. As mobile applications handle sensitive user data, it is important to follow best practices to ensure the security and privacy of this data. By implementing secure coding practices, securing network communication, encrypting sensitive data, and regularly reviewing and testing the code, developers can significantly reduce the risk of security vulnerabilities.

## 1. Secure Code Practices

When developing a React Native application, it is important to follow secure coding practices to prevent potential vulnerabilities. Here are some best practices to consider:

### Avoiding Hardcoded Secrets

Hardcoding secrets such as API keys, passwords, or tokens in the source code can expose your application to security risks. Instead, it is recommended to use secure storage mechanisms to store these secrets.

```javascript
// Bad practice: Hardcoded secret
const apiKey = 'your-api-key';

// Good practice: Using secure storage
import { SecureStore } from 'expo';

const storeSecret = async (key, value) => {
  await SecureStore.setItemAsync(key, value);
};

const retrieveSecret = async (key) => {
  const value = await SecureStore.getItemAsync(key);
  return value;
};
```

In the above example, we avoid hardcoding the API key and instead use the `SecureStore` from the Expo library to store and retrieve the secret.

### Implementing Input Validation

Input validation is an essential practice to prevent code injection attacks such as SQL injection or cross-site scripting (XSS). Always validate and sanitize user input to avoid potential security vulnerabilities.

```javascript
// Bad practice: No input validation
const handleLogin = (username, password) => {
  const query = `SELECT * FROM users WHERE username='${username}' AND password='${password}'`;
  // Execute the query
};

// Good practice: Input validation
const handleLogin = (username, password) => {
  // Validate and sanitize the input
  const sanitizedUsername = sanitize(username);
  const sanitizedPassword = sanitize(password);

  const query = `SELECT * FROM users WHERE username='${sanitizedUsername}' AND password='${sanitizedPassword}'`;
  // Execute the query
};
```

In the above example, we validate and sanitize the input to prevent potential SQL injection attacks.

### Preventing Code Injection

Code injection attacks can occur when user input is executed as code. To prevent code injection vulnerabilities, always use parameterized queries or prepared statements when interacting with databases.

```javascript
// Bad practice: Concatenating user input directly into the query
const handleQuery = (input) => {
  const query = `SELECT * FROM users WHERE id=${input}`;
  // Execute the query
};

// Good practice: Using parameterized queries
const handleQuery = (input) => {
  const query = 'SELECT * FROM users WHERE id=?';
  // Prepare the statement with the query
  const statement = db.prepare(query);

  // Execute the statement with the input as a parameter
  const result = statement.get(input);
};
```

In the above example, we use parameterized queries to prevent potential code injection vulnerabilities.

### Handling Errors Securely

When handling errors in a React Native application, it is important to avoid exposing sensitive information to users. Always provide generic error messages and log detailed error information securely.

```javascript
// Bad practice: Exposing detailed error information
try {
  // Code that may throw an error
} catch (error) {
  console.error(error); // Logging detailed error information
  throw new Error('An error occurred');
}

// Good practice: Providing generic error messages
try {
  // Code that may throw an error
} catch (error) {
  console.error('An error occurred'); // Logging generic error message
  throw new Error('An error occurred');
}
```

In the above example, we avoid logging detailed error information and provide a generic error message instead.

## 2. Authentication and Authorization

Authentication and authorization are crucial aspects of application security. Here are some best practices for implementing secure authentication and authorization in React Native applications:

### Implementing Secure Authentication

Secure authentication is essential to ensure that only authorized users can access the application. Use strong password hashing algorithms, such as bcrypt, to securely store and validate user passwords.

```javascript
// Bad practice: Storing passwords as plain text
const user = {
  username: 'john',
  password: 'password123',
};

// Good practice: Using bcrypt for password hashing
const bcrypt = require('bcrypt');

const user = {
  username: 'john',
  password: 'password123',
};

const saltRounds = 10;

// Hash the password before storing it
bcrypt.hash(user.password, saltRounds, (err, hash) => {
  if (err) throw err;
  user.password = hash;
});

// Validate the password during authentication
bcrypt.compare(password, user.password, (err, result) => {
  if (err) throw err;
  if (result) {
    // Successful authentication
  } else {
    // Invalid password
  }
});
```

In the above example, we use bcrypt to hash the password before storing it and compare the hashed password during authentication.

### Managing User Sessions

To ensure secure user sessions, generate a unique session token for each user session and store it securely. Validate the session token on each request to verify the authenticity of the user.

```javascript
// Bad practice: Storing session tokens in plain text
const sessionToken = 'abc123';

// Good practice: Generating and validating session tokens
const crypto = require('crypto');

const generateSessionToken = () => {
  const token = crypto.randomBytes(64).toString('hex');
  // Store the session token securely
  return token;
};

const validateSessionToken = (token) => {
  // Validate the session token
};

const sessionToken = generateSessionToken();
validateSessionToken(sessionToken);
```

In the above example, we use the `crypto` module to generate a random session token and validate it.

### Role-Based Access Control

Role-based access control (RBAC) is a security model that restricts user access based on their roles or permissions. Implement RBAC to ensure that users only have access to the resources and actions they are authorized for.

```javascript
// Bad practice: No access control
const user = {
  username: 'john',
  role: 'admin',
};

const isAdmin = (user) => {
  return user.role === 'admin';
};

// Good practice: Implementing RBAC
const user = {
  username: 'john',
  role: 'admin',
};

const isAuthorized = (user, permission) => {
  // Check if the user has the required permission
};

isAuthorized(user, 'create');
```

In the above example, we implement a basic RBAC system to check if a user has a specific permission.

## 3. Network Security

Network security is crucial for protecting sensitive data transmitted over the network. Here are some best practices for ensuring network security in React Native applications:

### Using HTTPS for API Requests

Always use HTTPS for API requests to encrypt the data transmitted between the client and the server. This prevents eavesdropping and ensures the integrity of the data.

```javascript
// Bad practice: Sending API requests over HTTP
const url = 'http://api.example.com';

// Good practice: Sending API requests over HTTPS
const url = 'https://api.example.com';
```

In the above example, we ensure that API requests are sent over HTTPS instead of HTTP.

### Implementing Certificate Pinning

Certificate pinning is a technique to ensure that the client only communicates with a trusted server by verifying the server's SSL certificate. Implement certificate pinning to prevent man-in-the-middle attacks.

```javascript
// Bad practice: No certificate pinning
const sslCertificate = require('ssl-certificate');

const verifyCertificate = (cert) => {
  // Verify the SSL certificate
};

const serverCertificate = sslCertificate.get('api.example.com');
verifyCertificate(serverCertificate);

// Good practice: Implementing certificate pinning
const sslCertificate = require('ssl-certificate-pinning');

const verifyCertificate = (cert) => {
  // Verify the SSL certificate using pinned public key(s)
};

const serverCertificate = sslCertificate.get('api.example.com');
verifyCertificate(serverCertificate);
```

In the above example, we use the `ssl-certificate-pinning` library to implement certificate pinning and verify the SSL certificate.

### Securing Websockets

If your React Native application uses websockets for real-time communication, ensure the security of the websocket connection by using secure protocols such as WSS.

```javascript
// Bad practice: Using unsecured websocket connection
const socket = new WebSocket('ws://example.com');

// Good practice: Using secured websocket connection
const socket = new WebSocket('wss://example.com');
```

In the above example, we ensure that the websocket connection is established over WSS instead of WS.

## 4. Secure Data Storage

Securely storing sensitive data is crucial to prevent data breaches. Here are some best practices for secure data storage in React Native applications:

### Encrypting Sensitive Data

Encrypting sensitive data such as user passwords, API keys, or access tokens adds an extra layer of security. Use encryption algorithms such as AES to encrypt the data before storing it.

```javascript
// Bad practice: Storing sensitive data as plain text
const password = 'password123';

// Good practice: Encrypting sensitive data
const crypto = require('crypto');

const encrypt = (data, key) => {
  // Encrypt the data using the key
  return encryptedData;
};

const decrypt = (encryptedData, key) => {
  // Decrypt the data using the key
  return decryptedData;
};

const encryptedPassword = encrypt(password, 'encryption-key');
const decryptedPassword = decrypt(encryptedPassword, 'encryption-key');
```

In the above example, we use the `crypto` module to encrypt and decrypt sensitive data.

### Securing Local Storage

Local storage is commonly used in React Native applications to store session tokens or other sensitive data. Ensure the security of local storage by encrypting the data and implementing access controls.

```javascript
// Bad practice: Storing sensitive data in plain text
localStorage.setItem('sessionToken', 'abc123');

// Good practice: Storing sensitive data securely
import { SecureStore } from 'expo';

const storeSecret = async (key, value) => {
  await SecureStore.setItemAsync(key, value);
};

const retrieveSecret = async (key) => {
  const value = await SecureStore.getItemAsync(key);
  return value;
};

storeSecret('sessionToken', 'abc123');
const sessionToken = await retrieveSecret('sessionToken');
```

In the above example, we use the `SecureStore` from the Expo library to store and retrieve sensitive data securely.

### Protecting User Data

Ensure the privacy and security of user data by implementing appropriate access controls and encryption mechanisms. Minimize the collection and storage of unnecessary user data to reduce the risk of data breaches.

```javascript
// Bad practice: Collecting unnecessary user data
const user = {
  username: 'john',
  email: 'john@example.com',
  address: '123 Street',
};

// Good practice: Collecting minimal user data
const user = {
  username: 'john',
};
```

In the above example, we only collect the necessary user data to minimize the risk of data breaches.

## 5. Code Review and Testing

Performing regular code reviews and testing is essential to identify and fix security vulnerabilities. Here are some best practices for code review and testing in React Native applications:

### Performing Regular Code Reviews

Regular code reviews help identify potential security vulnerabilities and ensure that best practices are followed. Review the code for security flaws, such as insecure API usage, incorrect access controls, or missing input validation.

```javascript
// Bad practice: No code review process
// ...

// Good practice: Regular code reviews
// ...
```

In the above example, we emphasize the importance of regular code reviews to maintain code quality and security.

### Automated Security Testing

Automated security testing tools can help identify common security issues such as cross-site scripting, SQL injection, or insecure API usage. Integrate automated security testing into your development process to catch vulnerabilities early.

```javascript
// Bad practice: No automated security testing
// ...

// Good practice: Integrate automated security testing
// ...
```

In the above example, we emphasize the importance of integrating automated security testing into the development process.

### Penetration Testing

Penetration testing involves simulating real-world attacks to identify potential vulnerabilities in the application. Perform periodic penetration tests to evaluate the security posture of your React Native application.

```javascript
// Bad practice: No penetration testing
// ...

// Good practice: Perform penetration testing
// ...
```

In the above example, we highlight the significance of performing periodic penetration tests to ensure the security of the application.

## 6. Keeping Dependencies Updated

Keeping dependencies updated is important to ensure that security vulnerabilities in third-party libraries are addressed. Here are some best practices for keeping dependencies updated in React Native applications:

### Monitoring for Vulnerabilities

Regularly monitor for vulnerabilities in the dependencies used by your React Native application. Use tools such as npm audit or third-party vulnerability scanners to identify and address vulnerabilities.

```javascript
// Bad practice: Ignoring dependency vulnerabilities
// ...

// Good practice: Monitor for vulnerabilities
// ...
```

In the above example, we emphasize the importance of monitoring for vulnerabilities in dependencies.

### Regularly Updating Dependencies

Keep your dependencies up to date by regularly updating to the latest versions. Update dependencies manually or use tools such as npm-check-updates to automate the process.

```javascript
// Bad practice: Using outdated dependencies
// ...

// Good practice: Regularly update dependencies
// ...
```

In the above example, we highlight the importance of regularly updating dependencies to ensure the latest security patches are applied.

## Conclusion

In this tutorial, we have explored 10 best practices for ensuring the security of your React Native applications. By following these practices, you can significantly reduce the risk of security vulnerabilities and protect user data. Remember to implement secure coding practices, secure authentication and authorization, ensure network security, secure data storage, perform regular code reviews and testing, and keep dependencies updated. By prioritizing security throughout the development process, you can build secure and reliable React Native applications.

10 React Native Best Practices for Security

This tutorial will guide you through the process of creating a login form using React and Firebase Authentication. React is a popular JavaScript library for building user interfaces, while Firebase Authentication provides a secure and easy-to-use authentication service. By combining these two technologies, you can create a robust and secure login form for your web applications.

![creating login form react firebase authentication](https://dopebase.com/media/cover12.jpg)
## Introduction

### What is React?

React is a JavaScript library that allows you to build user interfaces in a modular and reusable way. It uses a component-based architecture, where each component represents a part of the user interface. React provides a virtual DOM, which allows for efficient updates to the user interface by only re-rendering the components that have changed.

### What is Firebase Authentication?

Firebase Authentication is a service provided by Google's Firebase platform that allows you to authenticate users in your web applications. It provides various authentication methods such as email/password, social logins, and phone number authentication. Firebase Authentication also handles user sessions and provides secure token-based authentication.

### Why use React and Firebase Authentication together?

React and Firebase Authentication are a powerful combination for building secure and scalable web applications. React's component-based architecture allows for easy integration with Firebase Authentication, while Firebase Authentication provides a secure and reliable authentication service. By using these two technologies together, you can create a login form that handles user authentication and manages user sessions with ease.

### Setting up Firebase Authentication

To get started with Firebase Authentication, you need to create a Firebase project and enable the authentication service. Follow the steps below to set up Firebase Authentication for your project.

#### Creating a Firebase project

1. Go to the [Firebase Console](https://console.firebase.google.com/) and click on "Add project".
2. Enter a name for your project and click on "Continue".
3. Follow the instructions to complete the project creation process.

#### Enabling Firebase Authentication

1. In the Firebase Console, click on "Authentication" in the left sidebar.
2. Click on the "Get started" button in the "Authentication" section.
3. Choose the authentication methods you want to enable for your project, such as email/password, social logins, or phone number authentication.
4. Follow the instructions to set up each authentication method.

#### Configuring Firebase in React

To use Firebase Authentication in your React application, you need to configure Firebase SDK and initialize it with your Firebase project credentials. Follow the steps below to configure Firebase in your React application.

1. Install the Firebase SDK by running the following command in your project directory:

   ```
   npm install firebase
   ```

2. Create a new file called `firebase.js` in your project directory and add the following code:

   ```javascript
   import firebase from 'firebase/app';
   import 'firebase/auth';

   const firebaseConfig = {
     // Your Firebase project configuration
   };

   firebase.initializeApp(firebaseConfig);

   export default firebase;
   ```

3. Replace `// Your Firebase project configuration` with your actual Firebase project configuration. You can find this information in the Firebase Console under "Project settings" > "General" > "Your apps".

4. Import the `firebase.js` file in your React component and use the Firebase SDK to authenticate users and manage user sessions.

## Creating the Login Form

Now that we have set up Firebase Authentication in our React application, we can proceed to create the login form. In this section, we will create a form component, handle form input, and validate user input.

### Creating the form component

First, let's create a form component that will display the login form to the user. Create a new file called `LoginForm.js` in your project directory and add the following code:

```javascript
import React, { useState } from 'react';

const LoginForm = () => {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');

  const handleEmailChange = (e) => {
    setEmail(e.target.value);
  };

  const handlePasswordChange = (e) => {
    setPassword(e.target.value);
  };

  const handleSubmit = (e) => {
    e.preventDefault();
    // Handle form submission
  };

  return (
    <form onSubmit={handleSubmit}>
      <input type="email" value={email} onChange={handleEmailChange} placeholder="Email" />
      <input type="password" value={password} onChange={handlePasswordChange} placeholder="Password" />
      <button type="submit">Login</button>
    </form>
  );
};

export default LoginForm;
```

In the code above, we define a functional component `LoginForm` that renders a form with two input fields for email and password, and a submit button. We use the `useState` hook to create state variables `email` and `password`, and update them when the user enters values in the input fields. The `handleEmailChange` and `handlePasswordChange` functions update the state variables when the user types in the input fields. The `handleSubmit` function is called when the form is submitted and prevents the default form submission behavior.

### Handling form input

In the previous section, we created the form component and handled form submission. Now, let's add functionality to handle form input and validate user input.

```javascript
// Inside the `LoginForm` component

const [error, setError] = useState('');

const handleEmailChange = (e) => {
  setEmail(e.target.value);
};

const handlePasswordChange = (e) => {
  setPassword(e.target.value);
};

const handleSubmit = async (e) => {
  e.preventDefault();

  if (!email || !password) {
    setError('Please enter your email and password.');
    return;
  }

  // Handle form submission
};
```

In the code above, we add a state variable `error` to store any error messages related to form input. We update the state variable `error` when the user submits the form without entering an email or password. We also check for the presence of email and password fields before submitting the form. If any field is empty, we set the `error` state variable with an appropriate error message.

### Validating user input

In the previous section, we added basic form input handling and error validation. Now, let's add more robust validation to the user input.

```javascript
// Inside the `LoginForm` component

const [error, setError] = useState('');

const handleEmailChange = (e) => {
  setEmail(e.target.value);
};

const handlePasswordChange = (e) => {
  setPassword(e.target.value);
};

const handleSubmit = async (e) => {
  e.preventDefault();

  if (!email || !password) {
    setError('Please enter your email and password.');
    return;
  }

  if (!/\S+@\S+\.\S+/.test(email)) {
    setError('Please enter a valid email address.');
    return;
  }

  if (password.length < 6) {
    setError('Please enter a password with at least 6 characters.');
    return;
  }

  // Handle form submission
};
```

In the code above, we add more validation checks to the user input. We use a regular expression to validate the email format and check if the password has at least 6 characters. If any of the validation checks fail, we set the `error` state variable with an appropriate error message.

## Implementing Firebase Authentication

Now that we have created the login form and handled form input and validation, we can proceed to implement Firebase Authentication. In this section, we will set up the Firebase SDK, handle user authentication, and manage user sessions.

### Setting up Firebase SDK

To use Firebase Authentication in our React application, we need to set up the Firebase SDK and initialize it with our Firebase project credentials. We have already done this in the previous section when we configured Firebase in React. Now, let's import the `firebase.js` file in our `LoginForm` component and handle user authentication.

```javascript
// Inside the `LoginForm` component

import firebase from './firebase';

const handleSubmit = async (e) => {
  e.preventDefault();

  if (!email || !password) {
    setError('Please enter your email and password.');
    return;
  }

  if (!/\S+@\S+\.\S+/.test(email)) {
    setError('Please enter a valid email address.');
    return;
  }

  if (password.length < 6) {
    setError('Please enter a password with at least 6 characters.');
    return;
  }

  try {
    await firebase.auth().signInWithEmailAndPassword(email, password);
    // User is logged in
  } catch (error) {
    setError(error.message);
  }
};
```

In the code above, we import the `firebase.js` file that initializes the Firebase SDK. We use the `signInWithEmailAndPassword` method provided by the Firebase SDK to authenticate the user with the entered email and password. If the authentication is successful, the user is logged in. If any error occurs during the authentication process, we set the `error` state variable with the error message.

### Handling user authentication

In the previous section, we implemented user authentication using Firebase Authentication. Now, let's add functionality to handle user authentication and manage user sessions.

```javascript
// Inside the `LoginForm` component

import firebase from './firebase';

const [user, setUser] = useState(null);

useEffect(() => {
  const unsubscribe = firebase.auth().onAuthStateChanged((user) => {
    if (user) {
      setUser(user);
    } else {
      setUser(null);
    }
  });

  return () => unsubscribe();
}, []);

const handleSubmit = async (e) => {
  // ...

  try {
    await firebase.auth().signInWithEmailAndPassword(email, password);
    // User is logged in
  } catch (error) {
    setError(error.message);
  }
};
```

In the code above, we use the `useEffect` hook to listen for changes in the user's authentication state. When the user logs in or logs out, the `onAuthStateChanged` callback function is called with the user object. We update the `user` state variable based on the user's authentication state. If the user is logged in, we set the `user` state variable with the user object. If the user is logged out, we set the `user` state variable to `null`. We also add a cleanup function to unsubscribe from the authentication state changes when the component is unmounted.

## Adding Additional Functionality

In the previous sections, we created the login form and implemented Firebase Authentication. Now, let's add additional functionality to the login form, such as implementing password reset, adding social login options, and customizing the login form.

### Implementing password reset

To allow users to reset their passwords, we can implement a password reset functionality using Firebase Authentication's `sendPasswordResetEmail` method.

```javascript
// Inside the `LoginForm` component

const handleResetPassword = async (e) => {
  e.preventDefault();

  if (!email) {
    setError('Please enter your email.');
    return;
  }

  try {
    await firebase.auth().sendPasswordResetEmail(email);
    // Password reset email sent
  } catch (error) {
    setError(error.message);
  }
};
```

In the code above, we define a new function `handleResetPassword` that is called when the user clicks on a "Reset Password" button. We check if the email field is not empty and call the `sendPasswordResetEmail` method provided by the Firebase SDK. If the password reset email is successfully sent, we can display a success message to the user.

### Adding social login options

Firebase Authentication provides various social login options, such as Google, Facebook, and Twitter. To add social login options to our login form, we can use Firebase Authentication's `signInWithPopup` method.

```javascript
// Inside the `LoginForm` component

const handleSocialLogin = async (provider) => {
  try {
    await firebase.auth().signInWithPopup(provider);
    // User is logged in with the selected social provider
  } catch (error) {
    setError(error.message);
  }
};
```

In the code above, we define a new function `handleSocialLogin` that is called when the user clicks on a social login button, such as "Sign in with Google". We pass the selected social provider to the `signInWithPopup` method provided by the Firebase SDK. If the user successfully logs in with the selected social provider, we can handle the user's authentication state accordingly.

### Customizing the login form

To customize the login form, we can modify the HTML and CSS of the login form component according to our design requirements.

```javascript
// Inside the `LoginForm` component

const LoginForm = () => {
  // ...

  return (
    <form onSubmit={handleSubmit}>
      <h2>Login</h2>
      {error && <p className="error">{error}</p>}
      <input type="email" value={email} onChange={handleEmailChange} placeholder="Email" />
      <input type="password" value={password} onChange={handlePasswordChange} placeholder="Password" />
      <button type="submit">Login</button>
      <button onClick={handleResetPassword}>Reset Password</button>
      <p>or</p>
      <button onClick={() => handleSocialLogin(new firebase.auth.GoogleAuthProvider())}>
        Sign in with Google
      </button>
    </form>
  );
};
```

In the code above, we add a heading, an error message display, a button for password reset, and social login buttons to the login form. We also add CSS class names to style the form elements according to our design requirements.

## Testing and Deployment

In the previous sections, we created the login form, implemented Firebase Authentication, and added additional functionality. Now, let's discuss testing the login form, integration testing with Firebase, and deploying the React app.

### Unit testing the login form

To test the login form, we can use popular testing libraries and frameworks such as Jest and React Testing Library. We can write test cases to simulate user interactions, validate form input handling and validation, and check if the form submission and authentication processes work as expected.

### Integration testing with Firebase

To test the integration of the login form with Firebase Authentication, we can write test cases to simulate user authentication using the Firebase SDK. We can test if the user is successfully authenticated with valid email and password, if the error messages are displayed correctly for invalid inputs, and if the password reset and social login functionalities work as expected.

### Deploying the React app

To deploy the React app with the login form and Firebase Authentication, you can follow the deployment instructions specific to your hosting platform, such as Firebase Hosting, Netlify, or AWS Amplify. Make sure to build the React app before deploying it to ensure optimal performance and security.

## Conclusion

In this tutorial, we learned how to create a login form with React and Firebase Authentication. We set up Firebase Authentication in our React application, created the login form component, implemented form input handling and validation, and integrated Firebase Authentication to handle user authentication and manage user sessions. We also added additional functionality such as password reset and social login options. Finally, we discussed testing the login form and integrating it with Firebase, as well as deploying the React app.

By following this tutorial, you should now have a good understanding of how to create a login form with React and Firebase Authentication. You can further customize the login form and add more features based on your specific application requirements. Happy coding!

Creating a Login Form with React and Firebase Authentication

Angular

This tutorial will guide you through the process of setting up and implementing Firebase Authentication in an Angular project. Firebase Authentication provides a secure and easy way to manage user authentication in your application, including features such as email/password authentication, social media authentication, and user roles. By the end of this tutorial, you will have a fully functional authentication system in your Angular application using Firebase.

![angular firebase authentication guide](https://dopebase.com/media/cover2.jpg)
## Introduction
### What is Angular?
Angular is a popular JavaScript framework for building web applications. It allows developers to build dynamic and interactive web pages using a component-based architecture. Angular provides a wide range of features and tools that make it easy to develop scalable and maintainable applications.

### What is Firebase Authentication?
Firebase Authentication is a service provided by Google Firebase that allows developers to easily add authentication functionality to their applications. It provides a secure way to authenticate users using email/password, social media logins, and more. Firebase Authentication also handles user management tasks such as user registration, password reset, and email verification.

### Setting up Angular Project
Before we can start implementing Firebase Authentication in our Angular project, we need to set up the project itself. This involves installing the Angular CLI and creating a new Angular project. We will also need to add Firebase to our project.

#### Installing Angular CLI
To install the Angular CLI, open your terminal or command prompt and run the following command:

```bash
npm install -g @angular/cli
```

#### Creating a new Angular project
Once the Angular CLI is installed, we can create a new Angular project by running the following command:

```bash
ng new my-project
```

This will create a new directory called "my-project" with the basic structure of an Angular project.

#### Adding Firebase to the project
To add Firebase to our Angular project, we need to install the Firebase SDK. Run the following command in your terminal or command prompt:

```bash
npm install firebase
```

Now that we have our Angular project set up and Firebase installed, we can move on to implementing Firebase Authentication.

## Firebase Authentication
In this section, we will configure Firebase Authentication in our Angular project and implement the necessary functionality for user sign up, sign in, sign out, and handling user authentication state.

### Configuring Firebase Authentication
To configure Firebase Authentication, we need to create a new Firebase project and enable the Authentication service. 

1. Visit the [Firebase Console](https://console.firebase.google.com/) and create a new project.
2. Once the project is created, navigate to the "Authentication" section in the Firebase Console.
3. Click on the "Sign-in method" tab and enable the desired authentication providers (e.g., email/password, Google, Facebook, etc.).

### Implementing Sign Up functionality
To allow users to sign up for our application, we need to create a sign-up form and handle the form submission in our Angular project. 

1. In your Angular project, create a new component called "SignUp" using the Angular CLI:

```bash
ng generate component SignUp
```

2. Open the "sign-up.component.html" file and add the following form:

```html
<form (ngSubmit)="onSubmit()">
  <input type="email" [(ngModel)]="email" name="email" placeholder="Email" required>
  <input type="password" [(ngModel)]="password" name="password" placeholder="Password" required>
  <button type="submit">Sign Up</button>
</form>
```

3. In the "sign-up.component.ts" file, add the following code:

```typescript
import { Component } from '@angular/core';
import { AngularFireAuth } from '@angular/fire/auth';

@Component({
  selector: 'app-sign-up',
  templateUrl: './sign-up.component.html',
  styleUrls: ['./sign-up.component.css']
})
export class SignUpComponent {
  email: string;
  password: string;

  constructor(private afAuth: AngularFireAuth) {}

  onSubmit() {
    this.afAuth.createUserWithEmailAndPassword(this.email, this.password)
      .then((userCredential) => {
        // Handle successful sign up
      })
      .catch((error) => {
        // Handle error
      });
  }
}
```

In this code, we import the `AngularFireAuth` module from `@angular/fire/auth` and inject it into our component. In the `onSubmit()` method, we use the `createUserWithEmailAndPassword()` method to create a new user with the provided email and password.

### Implementing Sign In functionality
To allow users to sign in to our application, we need to create a sign-in form and handle the form submission in our Angular project.

1. In your Angular project, create a new component called "SignIn" using the Angular CLI:

```bash
ng generate component SignIn
```

2. Open the "sign-in.component.html" file and add the following form:

```html
<form (ngSubmit)="onSubmit()">
  <input type="email" [(ngModel)]="email" name="email" placeholder="Email" required>
  <input type="password" [(ngModel)]="password" name="password" placeholder="Password" required>
  <button type="submit">Sign In</button>
</form>
```

3. In the "sign-in.component.ts" file, add the following code:

```typescript
import { Component } from '@angular/core';
import { AngularFireAuth } from '@angular/fire/auth';

@Component({
  selector: 'app-sign-in',
  templateUrl: './sign-in.component.html',
  styleUrls: ['./sign-in.component.css']
})
export class SignInComponent {
  email: string;
  password: string;

  constructor(private afAuth: AngularFireAuth) {}

  onSubmit() {
    this.afAuth.signInWithEmailAndPassword(this.email, this.password)
      .then((userCredential) => {
        // Handle successful sign in
      })
      .catch((error) => {
        // Handle error
      });
  }
}
```

In this code, we import the `AngularFireAuth` module from `@angular/fire/auth` and inject it into our component. In the `onSubmit()` method, we use the `signInWithEmailAndPassword()` method to sign in the user with the provided email and password.

### Implementing Sign Out functionality
To allow users to sign out of our application, we need to create a sign-out button and handle the sign-out action in our Angular project.

1. In your Angular project, open the "app.component.html" file and add the following button:

```html
<button (click)="signOut()">Sign Out</button>
```

2. In the "app.component.ts" file, add the following code:

```typescript
import { Component } from '@angular/core';
import { AngularFireAuth } from '@angular/fire/auth';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  constructor(private afAuth: AngularFireAuth) {}

  signOut() {
    this.afAuth.signOut()
      .then(() => {
        // Handle successful sign out
      })
      .catch((error) => {
        // Handle error
      });
  }
}
```

In this code, we import the `AngularFireAuth` module from `@angular/fire/auth` and inject it into our component. In the `signOut()` method, we use the `signOut()` method to sign out the currently authenticated user.

### Handling User Authentication State
To handle the user authentication state in our Angular project, we can use the `authState` observable provided by Firebase Authentication.

1. In your Angular project, open the "app.component.ts" file and add the following code:

```typescript
import { Component } from '@angular/core';
import { AngularFireAuth } from '@angular/fire/auth';
import { Observable } from 'rxjs';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  user: Observable<firebase.User>;

  constructor(private afAuth: AngularFireAuth) {
    this.user = afAuth.authState;
  }
}
```

In this code, we import the `AngularFireAuth` module from `@angular/fire/auth` and inject it into our component. We also import the `Observable` class from `rxjs` to handle the asynchronous nature of the `authState` observable. In the constructor, we assign the `authState` observable to the `user` property.

## Additional Authentication Features
In addition to the basic sign up, sign in, and sign out functionality, Firebase Authentication provides additional features such as resetting passwords, email verification, social media authentication, securing Angular routes, and handling user roles.

### Resetting Password
To allow users to reset their passwords, we can use the `sendPasswordResetEmail()` method provided by Firebase Authentication.

1. In your Angular project, create a new component called "ResetPassword" using the Angular CLI:

```bash
ng generate component ResetPassword
```

2. Open the "reset-password.component.html" file and add the following form:

```html
<form (ngSubmit)="onSubmit()">
  <input type="email" [(ngModel)]="email" name="email" placeholder="Email" required>
  <button type="submit">Reset Password</button>
</form>
```

3. In the "reset-password.component.ts" file, add the following code:

```typescript
import { Component } from '@angular/core';
import { AngularFireAuth } from '@angular/fire/auth';

@Component({
  selector: 'app-reset-password',
  templateUrl: './reset-password.component.html',
  styleUrls: ['./reset-password.component.css']
})
export class ResetPasswordComponent {
  email: string;

  constructor(private afAuth: AngularFireAuth) {}

  onSubmit() {
    this.afAuth.sendPasswordResetEmail(this.email)
      .then(() => {
        // Handle successful password reset email
      })
      .catch((error) => {
        // Handle error
      });
  }
}
```

In this code, we import the `AngularFireAuth` module from `@angular/fire/auth` and inject it into our component. In the `onSubmit()` method, we use the `sendPasswordResetEmail()` method to send a password reset email to the user with the provided email.

### Email Verification
To verify user email addresses, we can use the `sendEmailVerification()` method provided by Firebase Authentication.

1. In your Angular project, open the "sign-up.component.ts" file and add the following code to the `onSubmit()` method:

```typescript
onSubmit() {
  this.afAuth.createUserWithEmailAndPassword(this.email, this.password)
    .then((userCredential) => {
      userCredential.user.sendEmailVerification();
      // Handle successful sign up
    })
    .catch((error) => {
      // Handle error
    });
}
```

In this code, we call the `sendEmailVerification()` method on the `user` object returned by the `createUserWithEmailAndPassword()` method to send a verification email to the user.

### Social Media Authentication
Firebase Authentication supports social media logins such as Google, Facebook, Twitter, and more. To implement social media authentication in our Angular project, we need to enable the desired authentication providers in the Firebase Console and use the corresponding methods provided by Firebase Authentication.

1. In your Angular project, open the "sign-in.component.ts" file and add the following code to the `onSubmit()` method:

```typescript
onSubmit() {
  this.afAuth.signInWithPopup(new firebase.auth.GoogleAuthProvider())
    .then((userCredential) => {
      // Handle successful sign in
    })
    .catch((error) => {
      // Handle error
    });
}
```

In this code, we use the `signInWithPopup()` method with the `GoogleAuthProvider` to sign in the user using their Google account. You can replace `GoogleAuthProvider` with the desired provider (e.g., `FacebookAuthProvider`, `TwitterAuthProvider`, etc.).

## Securing Angular Routes
To secure certain routes in our Angular application and restrict access to authenticated users, we can use route guards provided by Angular.

### Implementing Route Guards
1. In your Angular project, create a new service called "AuthGuard" using the Angular CLI:

```bash
ng generate service AuthGuard
```

2. Open the "auth-guard.service.ts" file and add the following code:

```typescript
import { Injectable } from '@angular/core';
import { CanActivate, Router } from '@angular/router';
import { AngularFireAuth } from '@angular/fire/auth';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';

@Injectable({
  providedIn: 'root'
})
export class AuthGuard implements CanActivate {

  constructor(private afAuth: AngularFireAuth, private router: Router) {}

  canActivate(): Observable<boolean> {
    return this.afAuth.authState.pipe(
      map((user) => {
        if (user) {
          return true;
        } else {
          this.router.navigate(['/sign-in']);
          return false;
        }
      })
    );
  }
}
```

In this code, we import the `CanActivate` interface and the `Router` module from `@angular/router`, the `AngularFireAuth` module from `@angular/fire/auth`, and the `Observable` and `map` operators from `rxjs`. We then implement the `CanActivate` interface and define the `canActivate()` method. In this method, we use the `authState` observable to check if the user is authenticated. If the user is authenticated, we return `true` to allow access to the route. If the user is not authenticated, we navigate the user to the sign-in page and return `false`.

### Restricting Access to Authenticated Users
To restrict access to certain routes in our Angular application to only authenticated users, we can use the `canActivate` property in the route configuration.

1. In your Angular project, open the "app-routing.module.ts" file and add the following code:

```typescript
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { AuthGuard } from './auth-guard.service';

const routes: Routes = [
  { path: 'dashboard', component: DashboardComponent, canActivate: [AuthGuard] },
  { path: 'profile', component: ProfileComponent, canActivate: [AuthGuard] },
  // ...
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }
```

In this code, we import the `Routes` and `RouterModule` modules from `@angular/router` and the `AuthGuard` service we created earlier. We define our routes and use the `canActivate` property to specify that the route can only be accessed by authenticated users.

## Handling User Roles
To handle user roles in our Angular application, we can create user roles and restrict access to certain routes based on those roles.

### Creating User Roles
1. In your Angular project, create a new service called "RoleService" using the Angular CLI:

```bash
ng generate service RoleService
```

2. Open the "role.service.ts" file and add the following code:

```typescript
import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class RoleService {
  private roles: string[] = [];

  constructor() {}

  getRoles(): string[] {
    return this.roles;
  }

  setRoles(roles: string[]): void {
    this.roles = roles;
  }

  hasRole(role: string): boolean {
    return this.roles.includes(role);
  }
}
```

In this code, we create a `RoleService` with methods to get the user roles, set the user roles, and check if the user has a specific role.

### Restricting Access based on User Roles
To restrict access to certain routes based on user roles, we can modify the `canActivate` method in our `AuthGuard` service.

1. In your Angular project, open the "auth-guard.service.ts" file and modify the `canActivate()` method as follows:

```typescript
canActivate(): Observable<boolean> {
  return this.afAuth.authState.pipe(
    map((user) => {
      if (user) {
        const roles = this.roleService.getRoles();
        if (roles.includes('admin')) {
          return true;
        } else {
          this.router.navigate(['/access-denied']);
          return false;
        }
      } else {
        this.router.navigate(['/sign-in']);
        return false;
      }
    })
  );
}
```

In this code, we import the `RoleService` and inject it into our `AuthGuard` service. We then check if the user has the "admin" role before allowing access to the route. If the user does not have the "admin" role, they will be redirected to the "access-denied" page.

## Conclusion
In this tutorial, we have learned how to set up and implement Firebase Authentication in an Angular project. We have covered the basics of Firebase Authentication, including sign up, sign in, and sign out functionality, as well as additional features such as resetting passwords, email verification, social media authentication, securing routes, and handling user roles. By following the steps in this tutorial, you should now have a solid foundation for implementing user authentication in your Angular applications using Firebase Authentication.

Angular and Firebase Authentication: A Complete Guide

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