Decline the event

        :param str comment: comment to add
        :param bool send_response: whether or not to send response back
        :return: Success / Failure
        :rtype: bool

def decline_event(self, comment=None, *, send_response=True):
        """ Decline the event

        :param str comment: comment to add
        :param bool send_response: whether or not to send response back
        :return: Success / Failure
        :rtype: bool
        """
        if not self.object_id:
            raise RuntimeError("Can't accept event that doesn't exist")

        url = self.build_url(
            self._endpoints.get('event').format(id=self.object_id))
        url = url + '/decline'

        data = {}
        if comment and isinstance(comment, str):
            data[self._cc('comment')] = comment
        if send_response is False:
            data[self._cc('sendResponse')] = send_response

        response = self.con.post(url, data=data or None)

        return bool(response)