gistfile1.txt

// database.js file
var client = require("mongodb").MongoClient;

client.connect('mongodb://127.0.0.1:27017/foodb', function (err, db) {
    if (err) {
        throw err;
    }

    exports.users = db.collection("users");
    exports.sessions = db.collection("sessions");
    exports.destroy = db.close;
});

// user.js file (loading collection)
var users = require("database").users;


// session.js file (loading collection)
var sessions = require("database").sessions;