mongo error auth failed error - everytime

[aly jee]

Hi everybody,

I'm a beginner in this area and i can not find any solution to this problem.
I'm bulding a chat app in Node.js using MongoLabs Database services.
I'm trying to connect to mongoDB with mong...@3.8.10 driver.
I've checked many times, everything is fine but i still get the "Auth Failed Error Code 18".
Here's my package.json

"dependencies": {

    "connect-mongo": "^0.4.1",

    "cookie-parser": "^1.1.0",

    "express": "^4.2.0",

    "express-session": "^1.2.0",

    "hogan-express": "^0.5.2",

    "mongoose": "^3.8.10",

    "passport": "^0.2.0",

    "passport-facebook": "^1.0.3",

    "socket.io": "^0.9.17"

  }

 

I've referred to mongoose docs for a better understanding of "How to connect to MonoDB by using Mongoose as a driver". But I could not find a solution.
Here's my code with which I'm trying to connect:

var express = require('express'),

app = express(),

path = require('path'),

config  = require('./config/config.js'),

session = require('express-session'),

ConnectMongo = require('connect-mongo')(session),

mongoose = require('mongoose');

mongoose.connect(config.dbURL);

var db = mongoose.connection;

db.on('error', console.error.bind(console, 'connection error:'));

db.once('open', function (callback) {

 console.log('yay!');

});