private async void BtnGetAdFree_Click(object sender, RoutedEventArgs e)
{
await StoreAccessHelper.Instance.SetupAdFreeSubscriptionInfoAsync();
uiNotificationService.HasAdFree = await StoreAccessHelper.Instance.CheckIfUserHasAdFreeSubscriptionAsync();
uiNotificationService.NotifyAdFreeChanged(uiNotificationService.HasAdFree);
}