Send a request to the device to play a sound.

        It's possible to pass a custom message by changing the `subject`.

def display_message(
        self, subject='Find My iPhone Alert', message="This is a note",
        sounds=False
    ):
        """ Send a request to the device to play a sound.

        It's possible to pass a custom message by changing the `subject`.
        """
        data = json.dumps(
            {
                'device': self.content['id'],
                'subject': subject,
                'sound': sounds,
                'userText': True,
                'text': message
            }
        )
        self.session.post(
            self.message_url,
            params=self.params,
            data=data
        )