code: def cluster_manager(self):
          
          credentials = self.authenticator.get_credentials()['options']
          connection_string = str(self.connstr)
          return Admin(credentials.get('username'), credentials.get('password'), connection_string=connection_string)
docs: Returns an instance of :class:`~.couchbase.admin.Admin` which may be
          used to create and manage buckets in the cluster.