Industry-standard authentication and authorization patterns for building secure, scalable access control systems.

• Covers JWT (with refresh token flow), session-based, and OAuth2/social login strategies with production-ready code examples
• Includes role-based access control (RBAC), permission-based authorization, and resource ownership validation patterns
• Provides password hashing with bcrypt, rate limiting, and security best practices including token expiration and secure cookie flags
• Demonstrates common pitfalls to avoid: weak passwords, client-only auth checks, missing token expiration, and unvalidated password resets