protected override async void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
Invites = await wishListService.InvitedWishLists();
InvitesListBox.ItemsSource = Invites.Count() == 0 ? new ObservableCollection <Wishlist>() : Invites;
Requests = await wishListService.GetRequests();
RequestsListBox.ItemsSource = Requests.Count() == 0 ? new ObservableCollection <PendingRequest>() : Requests;
}
