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Supabase Auth Invalid OAuth Callback

The OAuth callback URL is incorrect or not configured.

Understanding Supabase Auth

Supabase Auth is a powerful authentication provider that simplifies the process of adding user authentication to your applications. It supports various authentication methods, including OAuth, email/password, and third-party providers like Google, GitHub, and more. The tool is designed to be easy to integrate and manage, providing developers with a seamless experience in handling user authentication.

Identifying the Symptom: Invalid OAuth Callback

When integrating OAuth with Supabase Auth, you might encounter an error message stating 'Invalid OAuth Callback.' This error typically appears when the OAuth process is interrupted or fails to redirect correctly after user authentication.

Exploring the Issue: What Causes Invalid OAuth Callback?

The 'Invalid OAuth Callback' error usually occurs when the callback URL configured in your OAuth provider settings does not match the one set in your Supabase project. This mismatch prevents the OAuth provider from redirecting users back to your application correctly after authentication.

Common Causes

  • Incorrect callback URL in the OAuth provider settings.
  • Misconfigured redirect URL in the Supabase dashboard.
  • Typographical errors in the URL.

Steps to Fix the Invalid OAuth Callback Issue

To resolve the 'Invalid OAuth Callback' error, follow these steps:

Step 1: Verify the Callback URL in the OAuth Provider

Log in to your OAuth provider's dashboard (e.g., Google, GitHub) and navigate to the application settings. Ensure that the callback URL matches the one you intend to use in your Supabase project. The URL should be in the format:

https://your-app.supabase.co/auth/v1/callback

Replace your-app with your actual Supabase project name.

Step 2: Check the Redirect URL in Supabase Dashboard

Access your Supabase project dashboard and go to the 'Authentication' settings. Under the 'Redirect URLs' section, ensure that the URL matches the one configured in your OAuth provider. It should be identical to the callback URL you verified in Step 1.

Step 3: Test the Configuration

After updating the URLs, test the OAuth flow by attempting to log in through the provider. If configured correctly, the authentication process should complete without errors, and users should be redirected back to your application.

Additional Resources

For more information on setting up OAuth with Supabase Auth, refer to the following resources:

By following these steps and ensuring your URLs are correctly configured, you can resolve the 'Invalid OAuth Callback' error and provide a smooth authentication experience for your users.

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