Used by Variable/Connection.

https://github.com/apache/airflow/blob/894741e311ffd642e036b80d3b1b5d53c3747cad/airflow/secrets/metastore.py#L32

"""Handle Internal API /internal_api/v1/rpcapi endpoint."""
    log.debug("Got request")
    json_rpc = body.get("jsonrpc")
    if json_rpc != "2.0":