NodeJs Passport isAuthenticated() возвращает false даже после входа в систему

Я новичок в angularJs и пытаюсь создать локальную аутентификацию для веб-сайта. Я прошел через различные источники, и это https://vickev.com/#!/article/authentication-in-single-page-applications-node-js-passportjs-angularjs было очень полезно. Когда я попытался построить то же самое в моем локальном хосте, мой код попал в цикл.

app.post('/login',.....) возвращает пользователя в ответ, но после этого при загрузке страницы администратора он проверяет, вошел ли пользователь в систему, вызвав app.get('/loggedin ',...) и req.isAuthenticated() возвращает false даже после входа в систему и переходит в цикл. Я не могу понять, почему это происходит, PLZ помочь мне.

Кодовый код сервера

var express = require('express');
var http = require('http');
var path = require('path');
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;

//==================================================================
// Define the strategy to be used by PassportJS
passport.use(new LocalStrategy(
  function(username, password, done) {
    if (username === "admin" && password === "admin") // stupid example
      return done(null, {name: "admin"});

    return done(null, false, { message: 'Incorrect username.' });
  }
));

// Serialized and deserialized methods when got from session
passport.serializeUser(function(user, done) {
    done(null, user);
});

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

// Define a middleware function to be used for every secured routes
var auth = function(req, res, next){
  if (!req.isAuthenticated()) 
    res.send(401);
  else
    next();
};
//==================================================================

// Start express application
var app = express();

// all environments
app.set('port', process.env.PORT || 3000);
app.use(express.favicon());
app.use(express.cookieParser()); 
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.session({ secret: 'securedsession' }));
app.use(passport.initialize()); // Add passport initialization
app.use(passport.session());    // Add passport initialization
app.use(app.router);

app.all('*', function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

// development only
if ('development' == app.get('env')) {
  app.use(express.errorHandler());
}

//==================================================================
// routes
app.get('/', function(req, res){
  res.render('index', { title: 'Express' });
});

app.get('/users', auth, function(req, res){
  res.send([{name: "user1"}, {name: "user2"}]);
});
//==================================================================

//==================================================================
// route to test if the user is logged in or not
app.get('/loggedin', function(req, res) {
  res.send(req.isAuthenticated() ? req.user : '0');
});

// route to log in
app.post('/login', passport.authenticate('local'), function(req, res) {
  res.send(req.user);
});

// route to log out
app.post('/logout', function(req, res){
  req.logOut();
  res.send(200);
});
//==================================================================

http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});

Клиентский файл Js

'use strict';

/**********************************************************************
 * Angular Application
 **********************************************************************/
var app = angular.module('app', ['ngResource','ngRoute'])
  .config(function($routeProvider, $locationProvider, $httpProvider) {
    //================================================
    // Check if the user is connected
    //================================================
    var checkLoggedin = function($q, $timeout, $http, $location, $rootScope){
      // Initialize a new promise
      var deferred = $q.defer();

      // Make an AJAX call to check if the user is logged in
      $http.get('http://localhost:3000/loggedin').success(function(user){
        // Authenticated
        if (user !== '0')
          $timeout(deferred.resolve, 0);

        // Not Authenticated
        else {
          $rootScope.message = 'You need to log in.';
          $timeout(function(){deferred.reject();}, 0);
          $location.url('/login');
        }
      });

      return deferred.promise;
    };
    //================================================

    //================================================
    // Add an interceptor for AJAX errors
    //================================================
    $httpProvider.responseInterceptors.push(function($q, $location) {
      return function(promise) {
        return promise.then(
          // Success: just return the response
          function(response){
            return response;
          }, 
          // Error: check the error status to get only the 401
          function(response) {
            if (response.status === 401)
              $location.url('/login');
            return $q.reject(response);
          }
        );
      }
    });
    //================================================

    //================================================
    // Define all the routes
    //================================================
    $routeProvider
      .when('/', {
        templateUrl: 'views/main.html'
      })
      .when('/admin', {
        templateUrl: 'views/admin.html',
        controller: 'AdminCtrl',
        resolve: {
          loggedin: checkLoggedin
        }
      })
      .when('/login', {
        templateUrl: 'views/login.html',
        controller: 'LoginCtrl'
      })
      .otherwise({
        redirectTo: '/login'
      });
    //================================================

  }) // end of config()
  .run(function($rootScope, $http){
    $rootScope.message = '';

    // Logout function is available in any pages
    $rootScope.logout = function(){
      $rootScope.message = 'Logged out.';
      $http.post('http://localhost:3000/logout');
    };
  });


/**********************************************************************
 * Login controller
 **********************************************************************/
app.controller('LoginCtrl', function($scope, $rootScope, $http, $location) {
  // This object will be filled by the form
  $scope.user = {};

  // Register the login() function
  $scope.login = function(){
    $http.post('http://localhost:3000/login', {
      username: $scope.user.username,
      password: $scope.user.password,
    })
    .success(function(user){
      // No error: authentication OK
      $rootScope.message = 'Authentication successful!';
      $location.url('/admin');
    })
    .error(function(){
      // Error: authentication failed
      $rootScope.message = 'Authentication failed.';
      $location.url('/login');
    });
  };
});



/**********************************************************************
 * Admin controller
 **********************************************************************/
app.controller('AdminCtrl', function($scope, $http) {
  // List of users got from the server
  $scope.users = [];

  // Fill the array to display it in the page
  $http.get('http://localhost:3000/users').success(function(users){
    for (var i in users)
      $scope.users.push(users[i]);
  });
});