/* This call will:
 * - Check on SharedPreferences if a previous token has been saved
 * - Try to obtain the device token from FirebaseInstanceId
 * - Save the obtained token on SharedPreferences
 * - Initialize an MpnDevice object with the previous and current tokens
 */
MpnDevice.create(context, senderId, new MpnDevice.MpnDeviceCreationListener() {

    @Override
    public void onSuccess(@Nonnull MpnDevice device) {

        // The MpnDevice object is initialized and ready for use
    }

    @Override
    public void onFailure(@Nonnull Exception e) {

        // Something went wrong
    }
});