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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_depot_key(self, depot_id, app_id=0):
 """Get depot decryption key :param depot_id: depot id :type depot_id: :class:`int` :param app_id: app id :type app_id: :class:`int` :return: `CMsgClientGetDepotDecryptionKeyResponse <https://github.com/ValvePython/steam/blob/39627fe883feeed2206016bacd92cf0e4580ead6/protobufs/steammessages_clientserver_2.proto#L533-L537>`_ :rtype: proto message """

        return self.send_job_and_wait(MsgProto(EMsg.ClientGetDepotDecryptionKey),
                                      {
                                       'depot_id': depot_id,
                                       'app_id': app_id,
                                      },
                                      timeout=15
                                     )