code: def get_app_ticket(self, app_id):
          
          return self.send_job_and_wait(MsgProto(EMsg.ClientGetAppOwnershipTicket),
                                        {'app_id': app_id},
                                        timeout=15
                                       )
docs: Get app ownership ticket
  
          :param app_id: app id
          :type app_id: :class:`int`
          :return: `CMsgClientGetAppOwnershipTicketResponse <https://github.com/ValvePython/steam/blob/39627fe883feeed2206016bacd92cf0e4580ead6/protobufs/steammessages_clientserver.proto#L158-L162>`_
          :rtype: proto message