bugfix, desync, and add UI function

scripts/managers/user_profile_manager.gd

@@ -91,7 +91,7 @@ func load_stats() -> Dictionary:
 	if not NakamaManager.session:
 		return {}
 	
-	var user_id := NakamaManager.session.user_id
+	var user_id: String = NakamaManager.session.user_id
 	
 	var storage_result = await NakamaManager.client.read_storage_objects_async(
 		NakamaManager.session,
@@ -132,7 +132,7 @@ func update_display_name(new_name: String) -> bool:
 		emit_signal("profile_update_failed", "Display name too long (max 50 characters)")
 		return false
 	
-	var result := await NakamaManager.client.update_account_async(
+	var result: NakamaAsyncResult = await NakamaManager.client.update_account_async(
 		NakamaManager.session,
 		null, # username (don't change)
 		new_name # display_name