auth-implementation-patterns

JWT authentication for APIs involves generating tokens upon login and validating them via middleware on protected endpoints. This provides stateless access control for securing API routes.

Role-Based Access Control (RBAC) in Express assigns user roles and enforces permission checks via middleware before route handlers. This ensures users only access authorized resources.

OAuth2 integration with Passport.js uses strategies like Google or GitHub to authenticate users via third-party providers. It redirects users to the provider, then validates credentials to establish application sessions.

Redis is not required for stateless JWT authentication, but it is essential for managing server-side sessions and refresh token blacklisting. Using connect-redis with express-session provides scalable session storage.

Secure passwords by hashing them with bcrypt before database storage. Prevent brute force attacks by implementing rate limiting using express-rate-limit and rate-limit-redis to restrict repeated API requests.

Zod can validate incoming request bodies during authentication flows, ensuring login and registration data conforms to expected schemas before processing credentials or generating authorization tokens.