title: Login user and navigation back to home page Shell
body: <p>I am using Shell in my Xamarin forms application,
  I have an issue when My user registers successfully he is redirected to Homepage, however there is no Tab Menu on the bottom while if I redirect him to AppShell the page is blank. Do you have any suggestions?</p>
  
  <p>My redirection</p>
  
  <pre><code>await App.Current.MainPage.Navigation.PushModalAsync(new AppShell());
  </code></pre>
  
  <p>My AppShell</p>
  
  <pre><code>&lt;TabBar &gt;
          &lt;Tab  x:Name="HomePage" Icon="home.png" Title="{x:Static resources:AppResources.LabelHome}" &gt;
              &lt;ShellContent ContentTemplate="{DataTemplate views:HomePage}"/&gt;
          &lt;/Tab&gt;
          &lt;Tab  x:Name="Categories" Icon="collections.png " Title="{x:Static resources:AppResources.LabelCategory}"&gt;
              &lt;ShellContent ContentTemplate="{DataTemplate views:CategoriesPage}"/&gt;
          &lt;/Tab&gt;
          &lt;Tab  x:Name="Add" Icon="add.png" Title="{x:Static resources:AppResources.LabelAddingPage}"&gt;
              &lt;ShellContent ContentTemplate="{DataTemplate views:AddingPage}"/&gt;
          &lt;/Tab&gt;
          &lt;Tab  x:Name="Inbox" Icon="mail.png" Title="{x:Static resources:AppResources.LabelInbox}" &gt;
              &lt;ShellContent ContentTemplate="{DataTemplate views:InboxPage}"/&gt;
          &lt;/Tab&gt;
          &lt;Tab  x:Name="Profile" Icon="userg.png" Title="{x:Static resources:AppResources.LabelProfil}"&gt;
              &lt;ShellContent ContentTemplate="{DataTemplate views:UserProfilePage}"/&gt;
          &lt;/Tab&gt;
      &lt;/TabBar&gt;
  </code></pre>
  
  <p>And my app</p>
  
  <pre><code>public App()
          {
              InitializeComponent();
  
  
              MainPage = new AppShell();
          }
  </code></pre>