'Rotates the encryption keys for a cluster.
:type cluster_identifier: string
:param cluster_identifier: The unique identifier of the cluster that
you want to rotate the encryption keys for.
Constraints: Must be the name of valid cluster that has encryption
enabled.'

def rotate_encryption_key(self, cluster_identifier):

    params = {'ClusterIdentifier': cluster_identifier}
    return self._make_request(action='RotateEncryptionKey', verb='POST', path='/', params=params)
