post.js

/**
     * Create new user and save in database.
     */
    api.post('/signup', function (req, res) {
        var user = new User({
            name: req.body.name,
            username: req.body.username,
            password: req.body.password
        });
        var toekn = createToken(user);
        user.save(function (err) {
            if (err) {
                res.send(err);
                return;
            }
            res.json({
                success: true,
                message: "User has been created",
                token: toekn
            });
        });
    });