Adding User Controller and Delete endpoint

Controllers/UserController.cs

@@ -0,0 +1,40 @@
+using GameAuthApi.Models;
+using GameAuthApi.Services;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using System.Threading.Tasks;
+
+namespace GameAuthApi.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class UserController : ControllerBase
+{
+    private readonly UserService _userService;
+
+    public UserController(UserService userService)
+    {
+        _userService = userService;
+    }
+
+    // GET: /api/User
+    [HttpGet]
+    [Authorize(Roles = "SUPER")]
+    public async Task<IActionResult> GetAllUsers()
+    {
+        var users = await _userService.GetAllAsync();
+        return Ok(users);
+    }
+
+    // DELETE: /api/User?username=foo
+    [HttpDelete]
+    [Authorize(Roles = "SUPER")]
+    public async Task<IActionResult> DeleteUser([FromQuery] string username)
+    {
+        var deleted = await _userService.DeleteAsync(username);
+        if (!deleted)
+            return NotFound($"User '{username}' not found.");
+
+        return Ok($"User '{username}' deleted successfully.");
+    }
+}