remember me username and password improvement.

lib/controllers/providers/settings/setting_provider.dart

@@ -69,6 +69,9 @@ class SettingProvider extends ChangeNotifier {
     await prefs.setBool(ASettings.rememberMe, rememberMe);
     await prefs.setString(ASettings.userName, username);
     await prefs.setString(ASettings.password, password);
+
+    this.username = username;
+    this.password = password;
   }
 
   void selectAssetGroup(User user) {
@@ -85,7 +88,7 @@ class SettingProvider extends ChangeNotifier {
     setAssetGroup(_assetGroup);
   }
 
-  Future<void> setAssetGroup(AssetGroup? assetGroup) async {
+  void setAssetGroup(AssetGroup? assetGroup) {
     _assetGroup = assetGroup;
     ApiManager.instance.assetGroup = _assetGroup!;
     notifyListeners();