Express

OAuth 2.0 is the foundation for modern identity and access management, enabling applications to delegate user authentication securely. In this guide, you’ll learn how to implement the Authorization Code Flow—the most secure OAuth flow for web apps—using Node.js and Express. This is ideal for server-rendered apps or Backend-for-Frontend (BFF) patterns where you control the server exchanging the code for tokens. We’ll walk through everything from route setup to token exchange using only open-source libraries and built-in Express functionality. ...