Auth Implementation Patterns

This walks you through the messy realities of auth implementation with actual code patterns for JWT refresh flows, session management with Redis, OAuth2 integration, and RBAC systems. It covers the gotchas like token storage, logout mechanics, and permission checking that trip up most implementations. Use it when you're building login systems from scratch, debugging why tokens aren't refreshing properly, or trying to figure out the right auth strategy for your API. The examples are production-ready with proper error handling and security considerations baked in.