title: Get current user in Passport.js
body: <p>I have following Express.js file </p>
  
  <pre><code>var express = require('express');
  var favicon = require('serve-favicon');
  var morgan = require('morgan');
  var compression = require('compression');
  var bodyParser = require('body-parser');
  var methodOverride = require('method-override');
  var cookieParser = require('cookie-parser');
  var errorHandler = require('errorhandler');
  var path = require('path');
  var config = require('./environment');
  var passport = require('passport');
  
  module.exports = function(app) {
      var env = app.get('env');
  
      app.set('views', config.root + '/server/views');
      app.engine('html', require('ejs').renderFile);
      app.set('view engine', 'html');
      app.use(compression());
      app.use(bodyParser.urlencoded({
          extended: false
      }));
      app.use(bodyParser.json());
      app.use(methodOverride());
      app.use(cookieParser());
      app.use(passport.initialize());
      app.use(passport.session()); // passport session middleware 
      if ('production' === env) {
          app.use(favicon(path.join(config.root, 'public', 'favicon.ico')));
          app.use(express.static(path.join(config.root, 'public')));
          app.set('appPath', config.root + '/public');
          app.use(morgan('dev'));
      }
  
      if ('development' === env || 'test' === env) {
          app.use(require('connect-livereload')());
          app.use(express.static(path.join(config.root, '.tmp')));
          app.use(express.static(path.join(config.root, 'client')));
          app.set('appPath', 'client');
          app.use(morgan('dev'));
          app.use(errorHandler()); // Error handler - has to be last
      }
  };
  </code></pre>
  
  <p>After the user has logged in using Facebook, in my controller when I try to do 
  <code>req.user</code> or <code>req.session.passport.user</code> is get <code>undefined</code>.</p>
  
  <p>How can I get the current logged in user?</p>