app.js

/* app.js */

var express = require('express');
var app = express();

app.set('db', myDbHandle)

var login = require('./lib/login');

app.use(login(app));

/* lib/login */

var express = require('express');
var router = express.Router();

module.exports = function(app) {
  
  router.get('/login', function(req, res) {
    app.get('db').myDbMethod(function(err, body) {
      res.render('login', { data : body });
    });
  });
  
  return router;
};