Remove participants from an existing customer request
        The calling user must have permission to manage participants for this customer request

        :param issue_id_or_key: str
        :param users_list: list
        :return:

def remove_request_participants(self, issue_id_or_key, users_list):
        """
        Remove participants from an existing customer request
        The calling user must have permission to manage participants for this customer request

        :param issue_id_or_key: str
        :param users_list: list
        :return:
        """
        url = 'rest/servicedeskapi/request/{}/participant'.format(issue_id_or_key)
        data = {'usernames': users_list}

        return self.delete(url, data=data)