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OAuth with Google & GitHub

We add OAuth login for Google, GitHub, or both, including provider setup, callback handling, user creation, duplicate-email protection, and frontend redirects.

OAuth 2.0GoogleGitHubNode.js

Fixed starting scope

Each feature starts with a clear base package, then grows only if your app needs more integrations, screens, or edge cases.

Integrated into your code

We adapt implementation to your stack instead of dropping a generic snippet that still needs hours of cleanup.

Handoff included

You get implementation notes, environment variables, testing notes, and what to watch before pushing to production.

What you get

Provider app configuration checklist.
OAuth start and callback routes.
User creation and account-linking logic.
Secure callback state handling.
Frontend sign-in buttons and redirect behavior.

How we implement it

1

Create OAuth apps and redirect URLs.

2

Add provider configuration to server env.

3

Implement callback exchange and profile mapping.

4

Handle existing users with matching verified emails.

5

Test denied consent, duplicate account, and successful login paths.

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