docs: def add_request_participants(self, issue_id_or_key, users_list):
          """
          Add users as participants to 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.post(url, data=data)