Facebook登录和node js服务器

我正在尝试创建一个类似于Tinder的android应用程序。

到目前为止，我所拥有的是登录facebook，它的工作原理是这样的:用户发送访问令牌到我的服务器(在node js中编写)，然后它使用paspport-facebook-token库授权他。

现在我需要创建一个使用mongoose的用户数据库。我应该怎么做，在哪里做?如何保存用户，如果我只有facebook登录?我需要用什么来拯救用户群?

这是我的服务器路由。js代码:

    module.exports = function(app) {

    app.use(passport.initialize());
    app.use(passport.session());
    app.use(bodyParser.urlencoded({ extended: false }));
    app.use(bodyParser.json());


    app.get('/', function(req, res) {
        res.end("Node-Android-Chat-Project"); 
    });


    passport.use(new FacebookStrategy({
            clientID: *****1246,
            clientSecret: "******",
            callbackURL: "http://localhost:8080/auth/facebook/callback"
        },
        function(accessToken, refreshToken, profile, done) {
            console.log("accesToken ", accessToken)
            console.log ("refreshToken", refreshToken)
            console.log ("profile", profile)
            user = {} // find or create a user in your database
            done(null, user)
        }
    ));
    app.get('/auth/facebook/callback',
        passport.authenticate('facebook', {
            successRedirect : '/profile',
            failureRedirect : '/'
        }));
// Redirect the user to Facebook for authentication.  When complete,
// Facebook will redirect the user back to the application at
//     /auth/facebook/callback
    app.post('/auth/facebook/token', function(req, res, next) {
        passport.authenticate(['facebook-token'], function(err, user, info) {
            if (err) {
                return next(err); // will generate a 500 error
            }
            // Generate a JSON response reflecting authentication status
            if (! user) {
                console.log(req.user);
                return res.send({ success : false, message : 'authentication failed' });
            }
            console.log("Success!!");
                return res.send({ success : true, message : 'authentication succeeded' });
        })(req, res, next);
    });

    /*app.post('/auth/facebook/token',
        passport.authenticate('facebook-token'),
        function (req, res) {
            console.log(req)
            // do something with req.user
            res.send(req.user? 200 : 401);
        }
    ); */
    //app.get('/auth/facebook', passport.authenticate('facebook'));
//app.get(, );
// Facebook will redirect the user to this URL after approval.  Finish the
// authentication process by attempting to obtain an access token.  If
// access was granted, the user will be logged in.  Otherwise,
// authentication has failed.
    app.get('/auth/facebook/callback',
        passport.authenticate('facebook', { successRedirect: '/',
            failureRedirect: '/login' }));

    passport.serializeUser(function(user, done) {
        done(null, user);
    });
    passport.deserializeUser(function(user, done) {
        done(null, user);
    });
};