Handle invalid logins properly

LANCommander.Playnite.Extension/LANCommanderClient.cs

@@ -70,9 +70,6 @@ namespace LANCommander.PlaynitePlugin
                 Password = password
             }));
 
-            if (String.IsNullOrWhiteSpace(response.Data.AccessToken))
-                throw new WebException("Invalid username or password");
-
             switch (response.StatusCode)
             {
                 case HttpStatusCode.OK:
@@ -80,6 +77,7 @@ namespace LANCommander.PlaynitePlugin
 
                 case HttpStatusCode.Forbidden:
                 case HttpStatusCode.BadRequest:
+                case HttpStatusCode.Unauthorized:
                     throw new WebException("Invalid username or password");
 
                 default:

LANCommander.Playnite.Extension/Views/Authentication.xaml.cs

@@ -113,6 +113,12 @@ namespace LANCommander.PlaynitePlugin.Views
             catch (Exception ex)
             {
                 Plugin.PlayniteApi.Dialogs.ShowErrorMessage(ex.Message);
+
+                LoginButton.Dispatcher.Invoke(new System.Action(() =>
+                {
+                    LoginButton.IsEnabled = true;
+                    LoginButton.Content = "Login";
+                }));
             }
         }
     }

LANCommander/Controllers/Api/AuthController.cs

@@ -75,7 +75,7 @@ namespace LANCommander.Controllers.Api
                 });
             }
 
-            return RedirectToAction("Index", "Home");
+            return Unauthorized();
         }
 
         [HttpPost("Validate")]