code: @Override
    public Response doRequest(final StitchRequest stitchReq) {
      initAppMetadata(clientAppId);
  
      return super.doRequestUrl(stitchReq, getHostname());
    }
docs: Performs a request against a Stitch app server determined by the deployment model
  of the underlying app. Throws a Stitch specific exception if the request fails.
  
  @param stitchReq the request to perform.
  @return a {@link Response} to the request.