[self addPushNotificationsOnChannels:@[@"channel1", @"channel2"] withDevicePushToken:self.deviceToken andCompletion:^(PNAcknowledgmentStatus * _Nonnull status) {
    if (!status.error) {

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Token Chat" message:status.errorData.information delegate:@"Sent token OK" cancelButtonTitle:@"Close" otherButtonTitles:nil];
        [alert show];

    }
    else {

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Token error" message:status.errorData.information delegate:nil cancelButtonTitle:@"Close" otherButtonTitles:nil];
        [alert show];
    }
}];