How to add Tags to "Push Notification" Azure notification Hub

Hi

I need to add tags, after the user has logged in. (AD groups as tags)

https://azure.microsoft.com/en-us/documentation/articles/xamarin-notification-hubs-push-notifications-android-gcm/

I know that there are many articles that discuss the same.

This is called when you install the App.

protected override void OnRegistered(Context context, string registrationId)
{
Log.Verbose(MyBroadcastReceiver.TAG, "GCM Registered: " + registrationId);
RegistrationID = registrationId;

createNotification("PushHandlerService-GCM Registered...",
                    "The device has been Registered!");

Hub = new NotificationHub(Constants.NotificationHubName, Constants.ListenConnectionString,
                            context);
try
{
    Hub.UnregisterAll(registrationId);
}
catch (Exception ex)
{
    Log.Error(MyBroadcastReceiver.TAG, ex.Message);
}

//var tags = new List<string>() { "falcons" }; // create tags if you want
var tags = new List<string>() {};

try
{
    var hubRegistration = Hub.Register(registrationId, tags.ToArray());
}
catch (Exception ex)
{
    Log.Error(MyBroadcastReceiver.TAG, ex.Message);
}

}

Of course I've tried to make a small public function that does the same, but the context, causes problems.

So it is possible to update this registration or do anything else.

Best regards Christian Lyck