5-Supabase Auth Made Easy: GitHub OAuth Login Setup Tutorial

Screenshot from the tutorial

Supabase Auth Made Easy: Setting Up GitHub OAuth Login

In today’s digital landscape, implementing a secure authentication system is crucial for any web application. This tutorial will guide you through the process of setting up GitHub OAuth login in your Supabase app. By the end of this guide, you will have a fully functional authentication system that leverages Supabase's built-in capabilities.

Table of Contents

1. Prerequisites
2. Setting Up Your Supabase Project
3. Enabling GitHub as an OAuth Provider
4. Creating GitHub OAuth Credentials
5. Integrating GitHub Login into Your Frontend
6. Testing Your Setup
7. Conclusion

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Prerequisites

Before we dive into the integration, ensure you have the following:

• A Supabase account (you can sign up for free).
• A GitHub account.
• Basic knowledge of JavaScript and frontend development.

Setting Up Your Supabase Project

1. Create a New Project

   • Log in to your Supabase account.
   • Click on “New Project”.
   • Fill in the necessary details like project name, password, and database region.
   • After creating your project, navigate to the project dashboard.

2. Access Your API Keys

   • In the project dashboard, go to the "Settings" tab.
   • Under "API", note down your API URL and anon public key. These will be used in your frontend application.

Enabling GitHub as an OAuth Provider

1. Navigate to Authentication Settings

   • In your Supabase dashboard, go to the "Authentication" section.
   • Click on the "Settings" tab.

2. Enable GitHub Provider

   • Scroll down to the "External OAuth Providers" section.
   • Toggle the switch to enable GitHub as an authentication provider.

Creating GitHub OAuth Credentials

1. Go to GitHub Developer Settings

   • Log in to your GitHub account.
   • Navigate to Settings → Developer Settings → OAuth Apps.

2. Register a New OAuth Application

   • Click “New OAuth App”.
   • Fill in the application details:
     • Application Name: Name it something recognizable (e.g., "My Supabase App").
     • Homepage URL: Provide your application's URL (e.g., https://localhost:3000 for local development).
     • Authorization callback URL: Use the URL provided by Supabase in the format https://[your-project-ref].supabase.co/auth/v1/callback.

3. Save Your Credentials

   • After registration, GitHub will provide you with a Client ID and Client Secret.
   • Copy these values as you will need them in the Supabase dashboard.

4. Add GitHub Credentials to Supabase

   • Go back to your Supabase project.
   • In the Authentication settings, enter the Client ID and Client Secret you obtained from GitHub.

Integrating GitHub Login into Your Frontend

Now that your backend is set up, it’s time to integrate the login functionality into your frontend application.

1. Install Supabase Client Library

   • If you haven't already, install the Supabase JavaScript client:

   npm install @supabase/supabase-js
   

2. Initialize Supabase Client

   • Create a new JavaScript file (e.g., supabaseClient.js) and initialize your Supabase client:

   import { createClient } from '@supabase/supabase-js';
   
   const supabaseUrl = 'https://[your-project-ref].supabase.co';
   const supabaseAnonKey = '[your-anon-key]';
   
   const supabase = createClient(supabaseUrl, supabaseAnonKey);
   

3. Implement GitHub Login Functionality

   • In your frontend application, add a button for GitHub login:

   <button id="github-login">Login with GitHub</button>
   

   • Add an event listener to handle the login process:

   document.getElementById('github-login').addEventListener('click', async () => {
       const { user, session, error } = await supabase.auth.signIn({
           provider: 'github',
       });
   
       if (error) {
           console.error('Error during login:', error.message);
       } else {
           console.log('User logged in:', user);
       }
   });
   

Testing Your Setup

1. Run Your Application

   • Start your application and click the "Login with GitHub" button.
   • You should be redirected to GitHub for authentication. After logging in, you will be redirected back to your application.

2. Verify User Login

   • Check the console to confirm that user information is displayed. This indicates that authentication was successful.

Conclusion

Congratulations! You have successfully set up GitHub OAuth login in your Supabase app. By following these steps, you've harnessed the power of Supabase's authentication features, allowing your users to securely log in using their GitHub accounts.

For further enhancements, consider implementing user session management and exploring other authentication providers supported by Supabase. Happy coding!

Another view from the tutorial

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