ver1.js

'use strict';

var express = require('express');
var passport = require('passport');
var auth = require('../auth.service');

var router = express.Router();

var LocalStrategy = passport.authenticate('local', function (err, user, info) {
  var error = err || info;
  if (error) return res.json(401, error);
  if (!user) return res.json(404, {message: 'Something went wrong, please try again.'});

  var token = auth.signToken(user._id, user.role);
  res.json({token: token});
});

router.post('/', LocalStrategy);

module.exports = router;

ver2.js

'use strict';

var express = require('express');
var passport = require('passport');
var auth = require('../auth.service');

var router = express.Router();

var LocalStrategy = passport.authenticate('local', function (err, user, info) {
  var error = err || info;
  if (error) return res.json(401, error);
  if (!user) return res.json(404, {message: 'Something went wrong, please try again.'});

  var token = auth.signToken(user._id, user.role);
  res.json({token: token});
});

router.post('/', function(req, res, next) {
  LocalStrategy(req, res, next);
});

module.exports = router;