def supports_repl_key(self):
        version = self.get_mongo_version_info()
        return (version is None or
                version >= make_version_info(REPL_KEY_SUPPORTED_VERSION))

    ###########################################################################
We need a repl key if you are auth + a cluster member +
dataset/ETHPy150Open mongolab/mongoctl/mongoctl/objects/server.py/Server.supports_repl_key