app.route('/login')
    .get(sessionChecker, (req, res) => {
        res.sendFile(__dirname + '/public/login.html');
    })
    .post((req, res) => {
        var username = req.body.username,
            password = req.body.password;

        User.findOne({ where: { username: username } }).then(function (user) {
            if (!user) {
                res.redirect('/login');
            } else if (!user.validPassword(password)) {
                res.redirect('/login');
            } else {
                req.session.user = user.dataValues;
                res.redirect('/dashboard');

            }
        });
    });