yep

Shogi.UI/Pages/Home/Account/AccountState.cs

@@ -1,28 +1,27 @@
-namespace Shogi.UI.Pages.Home.Account;
+using static Shogi.UI.Shared.Events;
+
+namespace Shogi.UI.Pages.Home.Account;
 
 public class AccountState
 {
-    public event EventHandler<LoginEventArgs>? LoginChangedEvent;
+    public event AsyncEventHandler<LoginEventArgs>? LoginChangedEvent;
 
-    private User? user;
-    public User? User
+    public User? User { get; private set; }
+
+    public Task SetUser(User? user)
     {
-        get => user;
-        set
+        User = user;
+        return EmitLoginChangedEvent();
+    }
+
+    private async Task EmitLoginChangedEvent()
+    {
+        if (LoginChangedEvent is not null)
         {
-            if (user != value)
+            await LoginChangedEvent.Invoke(new LoginEventArgs
             {
-                user = value;
-                EmitLoginChangedEvent();
-            }
+                User = User
+            });
         }
     }
-
-    private void EmitLoginChangedEvent()
-    {
-        LoginChangedEvent?.Invoke(this, new LoginEventArgs
-        {
-            User = User
-        });
-    }
 }