private void InitConnectToGoogleStore()
 {
     try
     {
         var key = Xamarin.InAppBilling.Utilities.Security.Unify(new[] {
             GetNumberString(3),
             GetNumberString(6),
             GetNumberString(1),
             GetNumberString(4),
             GetNumberString(2),
             GetNumberString(7),
             GetNumberString(0),
             GetNumberString(5)
         }, new[] { 0, 1, 2, 3, 4, 5, 6, 7 });
         _serviceConnection = new InAppBillingServiceConnection(this, key);
         _serviceConnection.BindErrors();
         _serviceConnection.OnConnected += _serviceConnection_OnConnected;
     }
     catch (Exception exception)
     {
         GaService.TrackAppException(this.Class.Name, "InitConnectToGoogleStore", exception, false);
     }
 }