- Add UserService for centralized user management operations
- Implement Role-Based Access Control (RBAC) with admin/regular user roles
- Create admin API endpoints for user CRUD operations
- Add comprehensive testing suite with automated cleanup
- Implement user impersonation and admin status toggle
- Add detailed documentation (USER_MANAGEMENT.md, IMPLEMENTATION_SUMMARY.md)
- Update Tasks.md to reflect completed user management implementation
- Add database migrations for admin support
- Implement secure authentication flow with proper token handling

This completes Task 1.6: Comprehensive User Management System