choralcreatenew.js

app.use(function(req, res, next) {
  Choral.createNew({
    user: res.locals.userModel,
    type: 'device',
    name: 'asdf' 
  }, (err, choral) => { // HERE IS THE CALLBACK WE PASS
      if (err) {
        console.log(err);
        return next(err);
      }
      // DO THINGS WITH YOUR NEW CHORAL
    });

  return next();
});