In short
An open standard that lets users grant a third-party app limited access to their account on another service (Google, GitHub) without sharing their password.
How to learn this
- 1Read through the OAuth 'authorization code' flow diagram step by step.
- 2Try 'Sign in with GitHub' on a demo project using a library like NextAuth.
- 3Learn the difference between OAuth (authorization) and OpenID Connect (authentication).
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