in ContosoApp/ViewModels/AuthenticationViewModel.cs [172:184]
public async Task PrepareAsync()
{
if (ApplicationData.Current.RoamingSettings.Values.ContainsKey("IsLoggedIn") &&
(bool)ApplicationData.Current.RoamingSettings.Values["IsLoggedIn"])
{
await SetVisibleAsync(vm => vm.ShowLoading);
await LoginAsync();
}
else
{
await SetVisibleAsync(vm => vm.ShowWelcome);
}
}