Connect-Auth Facebook Example

server.js

// Example taken from https://github.com/ciaranj/connect-auth/issues/45 

var fbId= "xxxxxxxxxxxxx";
var fbSecret= "xxxxxxxxxxxxxx";
var fbCallbackAddress= "http://localhost:3000/auth/facebook_callback"

var cookieSecret = "node";     // enter a random hash for security

var express= require('express');
var auth = require('connect-auth')
var app = express.createServer();


app.configure(function(){
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.cookieParser());
    app.use(express.session({secret: cookieSecret}));
    app.use(auth([
        auth.Facebook({
            appId : fbId, 
            appSecret: fbSecret, 
            callback: fbCallbackAddress, 
            scope: 'email',
            failedUri: '/noauth'
        })
    ]));
    app.use(app.router);
});


app.get('/auth/facebook', function(req, res) {
  req.authenticate("facebook", function(error, authenticated) {
    if (authenticated) {
      res.redirect("/great");
    }
  });
});

app.get('/noauth', function(req, res) {
  console.log('Authentication Failed');
  res.send('Authentication Failed');
});

app.get('/great', function( req, res) {
  res.send('Supercoolstuff');
});

app.listen(3000);

The exemple kinda lacks explanation. What does req.authenticate([req.param('method')] in the line req.authenticate([req.param('method')], function(error, authenticated) does? How do you configure properly? I read the facebook doc, but I still cant figure out how to get connect-auth working, authentication failed all the time...?