Supabase Google Login: Easy Setup Guide

by Alex Braham 40 views

Alright, guys! Let's dive into setting up Google Login with Supabase. If you're looking to add a seamless authentication experience to your app, you've come to the right place. This guide will walk you through each step, making it super easy to follow along. We'll cover everything from creating your Supabase project to configuring Google OAuth and integrating it into your application. So, buckle up, and let's get started!

Why Use Supabase for Google Login?

Before we jump into the how-to, let's quickly touch on why Supabase is an excellent choice for handling Google Login. Supabase is an open-source Firebase alternative that provides you with all the backend features you need, including authentication, databases, storage, and more. Using Supabase for Google Login simplifies the entire process, offering a secure and scalable solution right out of the box.

With Supabase, you don't have to worry about the complexities of managing user sessions, handling OAuth flows, or securing your API endpoints. It takes care of all the heavy lifting, allowing you to focus on building a fantastic user experience. Plus, Supabase integrates seamlessly with various front-end frameworks and libraries, making it a versatile choice for any project.

Furthermore, Supabase's pricing is transparent and often more cost-effective than other platforms, especially as your user base grows. You get generous free tiers to start with, and their paid plans are designed to scale with your needs. So, not only do you get a powerful backend solution, but you also get it at a competitive price. Now that we've established the benefits, let's move on to the setup!

Prerequisites

Before we get our hands dirty, make sure you have the following prerequisites in place:

  • Supabase Account: If you don't already have one, sign up for a free account at supabase.com.
  • Google Cloud Account: You'll need a Google Cloud account to create and manage your OAuth credentials. If you don't have one, you can sign up at console.cloud.google.com.
  • Basic Coding Knowledge: A basic understanding of JavaScript and your preferred front-end framework (e.g., React, Vue, Angular) will be helpful.
  • Node.js and npm: Ensure you have Node.js and npm (Node Package Manager) installed on your machine. You'll need these to manage your project's dependencies.

Once you have these prerequisites in place, you're ready to start setting up Google Login with Supabase. If you encounter any issues along the way, don't worry! We'll provide troubleshooting tips and resources to help you out. Let's get started!

Step 1: Create a Supabase Project

First things first, let's create a new Supabase project. This will be the backend for our application, handling authentication, data storage, and more. Here’s how:

  1. Log in to Supabase: Go to supabase.com and log in with your account.
  2. Create a New Project: Click on the "New Project" button. You'll be prompted to enter some details for your project.
  3. Project Details:
    • Name: Choose a descriptive name for your project (e.g., "My Google Login App").
    • Database Password: Set a strong password for your database. Make sure to remember this password, as you'll need it later.
    • Region: Select the region that is closest to your users. This will help reduce latency and improve performance.
  4. Wait for Setup: Supabase will take a few minutes to set up your project. Once it's done, you'll be redirected to your project dashboard.

While Supabase is setting up your project, take a moment to familiarize yourself with the dashboard. You'll find various sections for managing your database, authentication, storage, and functions. This is where you'll configure your Google Login settings and monitor your application's performance.

Once your project is ready, make a note of your Supabase URL and anon key. You'll need these to connect your front-end application to your Supabase backend. You can find these details in the project settings under the "API" section. Keep these credentials secure, as they provide access to your Supabase project. With your Supabase project up and running, we can move on to configuring Google OAuth.

Step 2: Configure Google OAuth

Next, we need to set up Google OAuth to allow users to sign in with their Google accounts. This involves creating a project in the Google Cloud Console and configuring the OAuth consent screen. Here’s how to do it:

  1. Go to Google Cloud Console: Open console.cloud.google.com and log in with your Google account.
  2. Create a New Project: If you don't already have a project, click on the project dropdown at the top and select "New Project." Enter a name for your project and click "Create."
  3. Enable the People API:
    • In the Google Cloud Console, navigate to "APIs & Services" > "Library."
    • Search for "People API" and click on it.
    • Click "Enable" to enable the API.
  4. Configure OAuth Consent Screen:
    • Navigate to "APIs & Services" > "OAuth consent screen."
    • Select the "External" user type and click "Create."
    • Enter the following details:
      • App name: Choose a name for your application (e.g., "My Google Login App").
      • User support email: Select your email address.
      • Developer contact information: Enter your email address.
    • Click "Save and Continue."
    • On the "Scopes" screen, click "Add or Remove Scopes." Select the .../auth/userinfo.email and .../auth/userinfo.profile scopes and click "Update."
    • Click "Save and Continue."
    • On the "Test users" screen, add your email address as a test user. This will allow you to test the Google Login functionality before making it public.
    • Click "Save and Continue."
    • Review your configuration and click "Back to Dashboard."
  5. Create OAuth Credentials:
    • Navigate to "APIs & Services" > "Credentials."
    • Click "Create Credentials" and select "OAuth client ID."
    • Select "Web application" as the application type.
    • Enter a name for your OAuth client (e.g., "Supabase Google Login").
    • In the "Authorized JavaScript origins" field, enter the URL of your application (e.g., http://localhost:3000 for local development).
    • In the "Authorized redirect URIs" field, enter the callback URL for Supabase. This will be https://<YOUR-SUPABASE-PROJECT-ID>.supabase.co/auth/v1/callback.
    • Click "Create."
    • You'll be presented with your Client ID and Client Secret. Make a note of these, as you'll need them in the next step.

Configuring Google OAuth can be a bit tricky, but it's essential for ensuring a secure and seamless login experience. Double-check that you've entered the correct URLs and scopes, as any errors can prevent the login process from working correctly. With your OAuth credentials in hand, we can now configure Supabase to use them.

Step 3: Configure Supabase Authentication

Now that we have our Google OAuth credentials, we need to configure Supabase to use them. This involves adding the Client ID and Client Secret to your Supabase project settings. Here’s how:

  1. Go to Supabase Dashboard: Log in to supabase.com and navigate to your project dashboard.
  2. Authentication Settings:
    • In the left sidebar, click on "Authentication" > "Settings."
    • Scroll down to the "External OAuth Providers" section.
    • Find the "Google" provider and toggle the switch to enable it.
    • Enter your Google Client ID and Client Secret in the respective fields.
    • Click "Save."

By enabling the Google provider and providing your OAuth credentials, you're telling Supabase to use Google for authentication. Supabase will handle the OAuth flow, user management, and session management, allowing you to focus on building your application's features.

Make sure to keep your Client ID and Client Secret secure. Avoid committing them to your codebase or sharing them publicly. Instead, store them as environment variables or use a secret management tool to protect them. With Supabase configured to use Google Login, we can now integrate it into our front-end application.

Step 4: Integrate Google Login into Your Application

Finally, let's integrate Google Login into your front-end application. This involves adding a button that triggers the Google Login flow and handling the authentication response. Here’s a basic example using JavaScript:

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

// Initialize Supabase client
const supabaseUrl = '<YOUR_SUPABASE_URL>';
const supabaseKey = '<YOUR_SUPABASE_ANON_KEY>';
const supabase = createClient(supabaseUrl, supabaseKey);

// Function to sign in with Google
async function signInWithGoogle() {
  const { data, error } = await supabase.auth.signInWithOAuth({
    provider: 'google',
    options: {
      redirectTo: 'http://localhost:3000/callback',
    },
  });

  if (error) {
    console.error('Error signing in with Google:', error);
  } else {
    console.log('Signed in with Google:', data);
  }
}

// Add an event listener to the sign-in button
document.getElementById('google-login-button').addEventListener('click', signInWithGoogle);

In this example, we're using the @supabase/supabase-js library to interact with the Supabase API. We initialize the Supabase client with our project URL and anon key. Then, we define a function called signInWithGoogle that calls the supabase.auth.signInWithOAuth method with the google provider. This will redirect the user to the Google Login page.

After the user signs in with Google, they'll be redirected back to your application's callback URL. Supabase will handle the authentication response and store the user's session. You can then access the user's information using the supabase.auth.getUser() method.

Make sure to replace <YOUR_SUPABASE_URL> and <YOUR_SUPABASE_ANON_KEY> with your actual Supabase project URL and anon key. Also, update the redirectTo URL to match your application's callback URL. With this code in place, you should be able to sign in with Google in your application.

Step 5: Handling the Callback

After the user authenticates with Google, they are redirected back to your application. You need to handle this callback to complete the authentication process. Here’s how you can do it:

  1. Create a Callback Page: Set up a route in your application to handle the callback URL (e.g., /callback).
  2. Extract Session Data: In the callback page, use the Supabase client to extract the session data from the URL.
import { useEffect } from 'react';
import { useNavigate } from 'react-router-dom';
import { createClient } from '@supabase/supabase-js';

const supabaseUrl = '<YOUR_SUPABASE_URL>';
const supabaseKey = '<YOUR_SUPABASE_ANON_KEY>';
const supabase = createClient(supabaseUrl, supabaseKey);

function Callback() {
  const navigate = useNavigate();

  useEffect(() => {
    async function handleCallback() {
      const { data: { session }, error } = await supabase.auth.getSessionFromUrl();

      if (error) {
        console.error('Error handling callback:', error);
      } else if (session) {
        // Store the session or user data as needed
        console.log('Session:', session);
        // Redirect to the desired page
        navigate('/dashboard');
      } else {
        // Handle cases where there is no session
        navigate('/login');
      }
    }

    handleCallback();
  }, [navigate]);

  return (
    <div>
      <h1>Processing login...</h1>
    </div>
  );
}

export default Callback;

In this example, we use the getSessionFromUrl method to retrieve the session data from the URL. If the session is valid, we can store the user's information and redirect them to the desired page (e.g., /dashboard). If there is an error or no session, we can redirect them to the login page.

Make sure to replace <YOUR_SUPABASE_URL> and <YOUR_SUPABASE_ANON_KEY> with your actual Supabase project URL and anon key. Also, adjust the redirect URLs to match your application's routes. With the callback handled, you can now access the user's information and build personalized experiences.

Conclusion

So, there you have it! Setting up Google Login with Supabase is a straightforward process that can significantly enhance your application's user experience. By following these steps, you can quickly add secure and seamless authentication to your app, allowing users to sign in with their Google accounts. Remember to configure your Google OAuth credentials carefully, enable the Google provider in Supabase, and handle the callback correctly in your front-end application. With Supabase, you can focus on building amazing features while it takes care of the backend complexities. Happy coding, and enjoy your new Google Login functionality!