I am getting the following error when running the node server:

$ node server.js

module.js:339

    throw err;

    ^



Error: Cannot find module './server/routes'

    at Function.Module._resolveFilename (module.js:337:15)

    at Function.Module._load (module.js:287:25)

    at Module.require (module.js:366:17)

    at require (module.js:385:17)

    at Object.<anonymous> (C:Usersattasdocumentsgithubangular-express-authserver.js:12:10)

    at Module._compile (module.js:435:26)

    at Object.Module._extensions..js (module.js:442:10)

    at Module.load (module.js:356:32)

    at Function.Module._load (module.js:311:12)

    at Function.Module.runMain (module.js:467:10)

Below is my project structure:

server.js:

var express = require('express'),

jwt = require('express-jwt'),

bodyParser = require('body-parser'),

morgan = require('morgan'),

methodOverride = require('method-override'),

errorHandler = require('express-error-handler'),

tokenManager = require('./server/config/token_manager'),

secret = require('./server/config/secret'),

http = require('http'),

path = require('path');



var app = module.exports = express();



app.set('port', process.env.PORT || 3000);    

app.use(morgan('dev'));

app.use(bodyParser.json());

app.use(methodOverride());

app.use(express.static(path.join(__dirname, 'app')));



var routes = require('./server/routes');

routes.users = require('./server/routes/users.js');

var env = process.env.NODE_ENV || 'development';



// development only

if (env === 'development') {

  app.use(errorHandler());

}



// production only

if (env === 'production') {

  // TODO

}



app.all('*', function(req, res, next) {

  res.set('Access-Control-Allow-Origin', 'http://localhost');

  res.set('Access-Control-Allow-Credentials', true);

  res.set('Access-Control-Allow-Methods', 'GET, POST, DELETE, PUT');

  res.set('Access-Control-Allow-Headers', 'X-Requested-With, Content-Type, Authorization');

  if ('OPTIONS' == req.method) return res.send(200);

  next();

});



/*

Login

*/

app.post('/login', routes.users.login);

app.post('/user/register', routes.users.register);

app.get('/me', routes.users.me);



/*

Logout

*/

app.get('/logout', jwt({secret: secret.secretToken}), routes.users.logout);



process.on('uncaughtException', function(err) {

    console.log(err);

});



/**

* Start Server

*/

http.createServer(app).listen(app.get('port'), function () {

  console.log('Express server listening on port ' + app.get('port'));

});

Not getting any error for

tokenManager = require('./server/config/token_manager') and
secret = require('./server/config/secret')

wondering why it cannot load only ./server/routes ?