ExpressJS middlewares async

So instead of:

app.use(getUser);
app.use(getSiteList);
app.use(getCurrentSite);
app.use(getSubscription);

… we could do something like this:

function parallel(middlewares) {
  return function (req, res, next) {
    async.each(middlewares, function (mw, cb) {
      mw(req, res, cb);
    }, next);
  };
}

app.use(parallel([
  getUser,
  getSiteList,
  getCurrentSite,
  getSubscription
]));