Removes users from a group.

        :param user_id: User ID to remove
        :param thread_id: Group ID to remove people from. See :ref:`intro_threads`
        :raises: FBchatException if request failed

def removeUserFromGroup(self, user_id, thread_id=None):
        """
        Removes users from a group.

        :param user_id: User ID to remove
        :param thread_id: Group ID to remove people from. See :ref:`intro_threads`
        :raises: FBchatException if request failed
        """
        thread_id, thread_type = self._getThread(thread_id, None)

        data = {"uid": user_id, "tid": thread_id}
        j = self._post(self.req_url.REMOVE_USER, data, fix_request=True, as_json=True)