Auto focus on login text box

Hcs.WebApp/Components/Pages/Account/Login.razor

@@ -10,7 +10,7 @@
             <RadzenText TextStyle="TextStyle.H5" TextAlign="TextAlign.Center">Вход</RadzenText>
             <RadzenFormField Text="Логин" Variant="Variant.Outlined">
                 <ChildContent>
-                    <RadzenTextBox Name="UserName" @bind-Value=@Input.UserName AutoCompleteType="AutoCompleteType.Username" />
+                    <RadzenTextBox @ref="@userNameTextBox" Name="UserName" @bind-Value=@Input.UserName AutoCompleteType="AutoCompleteType.Username" />
                 </ChildContent>
                 <Helper>
                     <RadzenRequiredValidator Component="UserName" Text="Поле 'Логин' обязательно к заполнению" />
@@ -41,6 +41,8 @@
         public string Password { get; set; } = "";
     }
 
+    RadzenTextBox userNameTextBox;
+
     [SupplyParameterFromForm]
     InputModel Input { get; set; } = new();
 
@@ -52,8 +54,6 @@
 
     protected override void OnAfterRender(bool firstRender)
     {
-        base.OnAfterRender(firstRender);
-
         if (firstRender)
         {
             if (Status == "failed")
@@ -66,6 +66,8 @@
                     Duration = -1d
                 });
             }
+
+            userNameTextBox.Element.FocusAsync();
         }
     }
 }