public void IdsAvailable(string oneSignalUserId, string registrationId)
            {
                var user        = App.CurrentUserEnvironment.User;
                var idUser      = user.IdUser.ToString();
                var credentials = string.Format("{0}/{1}/{2}", user.LastName, user.FirstName, user.Email);

                //Sync email
                OneSignal.SyncHashedEmail(user.Email);
                //Create user tags
                OneSignal.GetTags(new GetTagsHandler(idUser, credentials));
                //Silent notification
                OneSignal.SetInFocusDisplaying(OneSignal.OSInFocusDisplayOption.None);
            }