JWT Authentication Skill Implement secure, scalable authentication in Node.js applications using JSON Web Tokens. Quick Start JWT authentication in 4 steps: 1. Install - 2. Register - Hash password, create user, generate token 3. Login - Verify password, generate token 4. Protect - Verify token in middleware Core Concepts Generate JWT User Registration User Login Authentication Middleware Learning Path Beginner (1-2 weeks) - ✅ Understand JWT structure - ✅ Implement registration/login - ✅ Create authentication middleware - ✅ Protect routes Intermediate (3-4 weeks) - ✅ Refresh token flow - ✅ Ro…