OAuth2orize

OAuth2orize is a Node.js module for implementing OAuth 2.0 authorization servers, providing the server-side machinery needed to support standard OAuth grant types such as authorization code, implicit, resource owner password credentials, and client credentials. It integrates with Express and similar frameworks, letting developers define how clients are authenticated, how authorization decisions are made, and how tokens are issued, all through a clean, extensible API. The module encourages a modular design where individual grant types are plugged in as needed, enabling only relevant flows for a given application, such as supporting third-party app access without exposing user credentials. It also provides helpers for serializing clients and users into session state, signing tokens, and validating requests, reducing the boilerplate developers would otherwise write.