code: def channels_add_owner(self, room_id, user_id=None, username=None, **kwargs):
          
          if user_id:
              return self.__call_api_post('channels.addOwner', roomId=room_id, userId=user_id, kwargs=kwargs)
          elif username:
              return self.__call_api_post('channels.addOwner', roomId=room_id, username=username, kwargs=kwargs)
          else:
              raise RocketMissingParamException('userID or username required')
docs: Gives the role of owner for a user in the current channel.