title: How to bind entry from page with ViewModel
body: <p>I'm trying to implement Login system like this:</p>
  
  <pre><code>public Command LoginCommand =&gt; new Command(async () =&gt;
          {
              LoginModel model = new LoginModel("dnetTest", "dnetTest"); // (get value from entry instead of "dnetTest")
  
          if (model.CheckInformation())
          {
              bool isSuccess = await LoginService.Login(model);
              if (isSuccess)
              {
                  await Application.Current.MainPage.DisplayAlert("Пријављивање", "Успешно сте се пријавили", "OK.");
                  Application.Current.MainPage = new MainPage();
              }
          }
  </code></pre>
  
  <p>My LogingPage also have:</p>
  
  <pre><code> &lt;Label Text="Korisničko ime"/&gt;
   &lt;Entry x:Name="Entry_Username" Placeholder="Korisničko ime"/&gt;
   &lt;Label Text="Lozinka"/&gt;
   &lt;Entry x:Name="Entry_Password" Placeholder="Lozinka"/&gt;
   &lt;Button Text="Prijavi se" Command="{Binding LoginCommand}"/&gt;
  </code></pre>
  
  <p>So, my question is how to bind Entry_Username and Entry_Password with LoginModel in LoginViewModel?
  And is there any way to bind it without using x:Names?</p>