javascript - Error while using node passport authentication -

i using passport authentication in application. when try initialize passport getting error. using express building application. have corr

here app.js file app.js

/**  * module dependencies.  */ var express = require('express')   , routes = require('./routes')   , user = require('./routes/user')   , http = require('http')   , path = require('path');  var login = require('./routes/login');  var bodyparser = require('body-parser'); var app = express(); var db = require('./db.js'); var urlencodedparser = bodyparser.urlencoded({ extended: false }); var fetch = require('./routes/collect'); var passport = require('passport');  // environments app.set('port', process.env.port || 3000); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.favicon()); app.use(express.logger('dev')); app.use(passport.initialize()); app.use(passport.session()); app.use(express.bodyparser()); app.use(express.methodoverride()); app.use(app.router); app.use(express.static(path.join(__dirname, 'public')));  // development if ('development' == app.get('env')) {   app.use(express.errorhandler()); }  app.get('/', routes.index); app.get('/users', user.list); app.get('/login',login.user); app.get('/collect',fetch.collect); app.post('/auth', urlencodedparser, auth.authentication);  http.createserver(app).listen(app.get('port'), function(){   console.log('express server listening on port ' + app.get('port')); }); 

i getting error

app.use(passport.initialize());                  ^ typeerror: object #<object> has no method 'initialize'     @ object.<anonymous> (/home/kurakar/workspace/mywork/app.js:26:18)     @ module._compile (module.js:456:26)     @ object.module._extensions..js (module.js:474:10)     @ module.load (module.js:356:32)     @ function.module._load (module.js:312:12)     @ function.module.runmain (module.js:497:10)     @ startup (node.js:119:16)     @ node.js:902:3 

i have correctly defined passport module in ./routes/auth.js file.
ps: when install passport , passport-local using npm install --save passport , npm install --save passport-local shows these line:

passport@0.2.1 node_modules/passport ├── passport-strategy@1.0.0 └── pause@0.0.1  passport-local@1.0.0 node_modules/passport-local └── passport-strategy@1.0.0