def users_get_presence(self, user_id=None, username=None, **kwargs):
        """Gets the online presence of the a user."""
        if user_id:
            return self.__call_api_get('users.getPresence', userId=user_id, kwargs=kwargs)
        elif username:
            return self.__call_api_get('users.getPresence', username=username, kwargs=kwargs)
        else:
            raise RocketMissingParamException('userID or username required')
Gets the online presence of the a user.