OAuthAn authorization framework — lets apps access user data without sharing passwords. 2.0 is how you 'Sign in with Google/GitHubA platform for Git hosting, pull requests, and CI — the center of open-source collaboration.' and how APIs delegate access with bearer tokens. Authorization servers issue tokens after user consent; resource servers validate them. Every SaaSSoftware as a Service — applications delivered over the internet on a subscription basis. integration, mobile login, and third-party APIApplication programming interface — a defined way for programs to talk to each other or to a service. permission screen builds on these flows — authorization code, client credentials, and more.

OAuthAn authorization framework — lets apps access user data without sharing passwords. 2.0 replaced ad-hoc APIApplication programming interface — a defined way for programs to talk to each other or to a service. keys and password sharing with a standard consent model.

It became the foundation for modern identity federation, APIApplication programming interface — a defined way for programs to talk to each other or to a service. security, and OpenID ConnectAn identity layer on OAuth 2.0 — standardized login with ID tokens and user profiles..