Build auth API

src/Robware.Api.Auth/Controllers/AuthController.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Logging;
+using Robware.Api.Auth.Models;
+using Robware.Auth;
+
+namespace Robware.Api.Auth.Controllers {
+	[ApiController]
+	[Route("[controller]")]
+	public class AuthController : ControllerBase {
+		private readonly ILogger<AuthController> _logger;
+		private readonly IAuthenticator _authenticator;
+
+		public AuthController(ILogger<AuthController> logger, IAuthenticator authenticator) {
+			_logger = logger;
+			_authenticator = authenticator;
+		}
+
+		[HttpPost(nameof(Authenticate))]
+		public async Task<ActionResult<User>> Authenticate(LoginRequest request) {
+			var (result, user) = await _authenticator.Authenticate(request.Username, request.Password);
+			switch (result) {
+				case AuthenticationResult.Success:
+					return user;
+				case AuthenticationResult.NotFound:
+					return NotFound();
+				case AuthenticationResult.IncorrectPassword:
+					return Unauthorized();
+				default:
+					throw new ArgumentOutOfRangeException();
+			}
+		}
+	}
+}