first commit

services/csharp/example/Controllers/AuthController.cs

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+using MediatR;
+using Microsoft.AspNetCore.Mvc;
+using SequenceAuth.Example.Features.Auth;
+
+namespace SequenceAuth.Example.Controllers;
+
+public class AuthController(IMediator mediator) : ApiControllerBase
+{
+    public record LoginRequest(string Username);
+
+    [HttpPost]
+    public async Task<IActionResult> Login([FromBody] LoginRequest request)
+    {
+        var result = await mediator.Send(new LoginCommand(request.Username));
+        return Ok(result.User);
+    }
+
+    [HttpPost]
+    public async Task<IActionResult> Logout()
+    {
+        await mediator.Send(new LogoutCommand());
+        return Ok();
+    }
+}