Build a User Management API with Spring Boot

Problem/Feature Description

A startup needs a user management API built with Spring Boot and Java. The API handles user registration, login, and profile management. A React single-page app hosted on a separate domain will consume this API. The backend will run on AWS behind an Application Load Balancer.

The API needs the following endpoints:

• POST /api/auth/register -- create a new user account (accepts name, email, password)
• POST /api/auth/login -- authenticate and return user info
• GET /api/users/me -- return the current user's profile
• PATCH /api/users/me -- update the current user's profile (name, email)
• GET /api/users -- list all users (admin only)
• DELETE /api/users/{id} -- delete a user account (admin only)

Use an in-memory Map or List as the data store (no database required). Users should have id, name, email, password, role (USER or ADMIN), and createdAt fields.

Output Specification

Produce:

• SecurityConfig.java -- Spring Security configuration
• UserController.java -- REST controller with all endpoints
• UserService.java -- Business logic for user operations
• User.java -- User entity/model
• pom.xml -- With all required dependencies