module.exports = {
	// the database url to connect
	//url : 'mongodb://node:nodeuser@mongo.onmodulus.net:27017/uwO3mypu'
    url:'mongodb://heroku_app35444036:Test123456@@ds059661.mongolab.com:59661/heroku_app35444036'
}

module.exports = {
	// the database url to connect
	url : 'mongodb://node:nodeuser@mongo.onmodulus.net:27017/uwO3mypu'
    //url:'mongodb://heroku_app35444036:Test123456@@ds059661.mongolab.com:59661/heroku_app35444036'
}

Update database.js