- Remove unused register_user() method and helper methods - Remove legacy UserRegister schema (customer registration uses CustomerService) - Remove wrapper methods that just delegated to auth_manager - Simplify auth_service to focus on login and vendor access control - Clean up tests to match simplified service The only registration path is now /api/v1/shop/auth/register for customers, which uses CustomerService.register_customer(). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>