label Hide and show using xaml and mvvvm

Question

How to Lable Hide and show if admin is login then one label is displayed otherwise label is hidden {How Solve it} ?

 

xaml Code

 

<StackLayout IsVisible="{Binding IsAdminTrue}"> 
<Label Text="is_professional"></Label> </StackLayout>
ViewModel Code
public void IsProfessional()
{ if (CurrentUser.IsAdmin!= true) { IsAdminTrue= false; } 
else { IsAdminTrue= true; } }