Always getting false responseSuccess method

[ivandharo]

Description: Hi, when i use the method PostNotification im getting everytime false but the notification works fine.

Environment

1. What version of the Xamarin SDK are you using? 4.6.0.800
2. How did you add the SDK to your project (eg. nuget) Nuget

Steps to Reproduce Issue: Here is the code.

        OneSignal.Current.PostNotification(notification, (responseSuccess) =>
        {
            respuestaNotificacion = true;
        }, (responseFailure) =>
        {
            respuestaNotificacion = false;
        });
        return respuestaNotificacion;