server/backend/routes/connectors.js
function serviceCall(req, res, next) {
        connector.configureSession(req.params.connection, req.body);
        res.send(204); // success --> 204 no content
    }
function serviceCall(req, res, next) {
        connector.configureSession(req.params.connection, req.body);
        res.send(204); // success --> 204 no content
    }
function serviceCall ( req , res , next ) { connector . configureSession ( req . params . connection , req . body ) ; res . send ( 204 ) ; // success --> 204 no content }
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.
installs session data such as credentials .