code: def volumes(self):
          
          self.connection._check_login()
          response = self.connection._do_get("{}/{}".format(self.connection._api_url, "types/Volume/instances")).json()
          all_volumes = []
          for volume in response:
              all_volumes.append(
                  SIO_Volume.from_dict(volume)
              )
          return all_volumes
docs: Returns a `list` of all the `Volume` known to the cluster.  Updates every time - no caching.
          :return: a `list` of all the `Volume` known to the cluster.
          :rtype: list