auth-implementation-patterns

Industry-standard authentication and authorization patterns for building secure, scalable access control systems. Build secure, scalable authentication and authorization systems using industry-standard patterns and modern best practices. Authentication (AuthN) : Who are you? Authorization (AuthZ) : What can you do? Session-Based: Token-Based (JWT): OAuth2/OpenID Connect: - 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 - Implementing user authentication systems - Securing REST or GraphQL APIs - Adding OAuth2/social login - Implementing role-based access control (RBAC) - Designing session management - Migrating authentication systems - Debugging auth issues - Implementing SSO or multi-tenancy - Verifying identity (username/password, OAuth, biometrics) - Issuing credentials (sessions, tokens) - Managing login/logout - Permission checking - Role-based access control (RBAC) - Resource ownership validation - Policy...