local passport login not sending any response

im trying to do the authentication using passport-local and i don't get any response for the /login route, basicly i followed the passport tutorial to set the local strategy like this:

var express = require('express');
var User = require('../models/User');
var router = express.Router();
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;

router.post('/', function (req, res, next) {
  var username = req.body.username;
  var password = req.body.password;
  passport.use(new LocalStrategy(
    function (username, password, done) {
      User.findOne({ username: username }, function (err, user) {
        if (err) { return done(err); }
        if (!user) {
           return res.status(406).json({message: 'There is no user with those fields'});
        }
        if (!user.validPassword(password)) {
           return res.status(406).json({message: 'Invalid password'});
        }
        return res.status(200).json({message: 'logged in'});
      });
    }
  ));
});

module.exports = router;

i want to associate the passport local with my post route so i set everything inside the specific route to test the behaviour, am i doing something wrong here?

via Antonio Costa