code: function serviceCall(req, res, next) {
          connector.configureSession(req.params.connection, req.body);
          res.send(204); // success --> 204 no content
      }
docs: installs session data such as credentials.
  
  @param req containing body JSON to pass as input.
  @param res result of call is provided as JSON body data.
  @param next function to invoke error handling.