Mongo db Atlas 3.6.5 authentication failed - node.js

Question

I am pretty new to node.js,am trying to write data to a free online mongo db atlas using mongoose,however i keep getting Authentication failed despite editing mongo db settings to connect from anywhere and also using correct username and password for the db user.
Here is my app.js file where i connect to mongo db
app.js:
const express = require('express');
const morgan = require('morgan');
const bodyParser= require('body-parser');
const mongoose = require('mongoose');
const app = express();
const productRoutes= require('./api/routes/products');
const ordersRoutes= require('./api/routes/orders');
mongoose.connect('mongodb+srv://hilary:'+process.env.MONGO_ATLAS_PW+'#node-rest-dnqwa.mongodb.net/test?retryWrites=true').catch(err => console.log(err));
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({extended:false}));
app.use(bodyParser.json());
app.use((req,res,next) =>{
res.header("Access-Control-Allow-Origin","*");
res.header('Access-Control-Allow-Headers','Origin,X-Requested-With,Content-Type,Accept,Authorization');
if(req.method === 'OPTIONS'){
res.header('Access-Control-Allow-Methods','PUT,POST,GET,DELETE,PATCH');
return res.status(200).json({});
}
next();
});
app.use('/products',productRoutes);
app.use('/orders',ordersRoutes);
app.use((req,res,next) => {
const error= new Error('not found');
error.status = 404;
next(error);
});
app.use((error,req,res,next) =>{
res.status(error.status || 500);
res.json({
error: {
message: error.message
}
})
})
module.exports = app;
i get this error in my terminal:
{ MongoError: authentication fail
at C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\topologies\replset.js:1430:15
at C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\pool.js:877:7
at C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\pool.js:853:20
at finish (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\auth\scram.js:174:16)
at handleEnd (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\auth\scram.js:184:7)
at C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\auth\scram.js:289:15
at C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\pool.js:544:18
at process._tickCallback (internal/process/next_tick.js:112:11)
name: 'MongoError',
message: 'authentication fail',
errors:
[ { name: 'node-rest-shard-00-00-dnqwa.mongodb.net:27017',
err: [MongoError] },
{ name: 'node-rest-shard-00-02-dnqwa.mongodb.net:27017',
err: [MongoError] } ] }
I am certain am using correct name and password so why cant it authenticate me,server runs on my localhost
EDIT
So i followed link to docs and now connect this way:
mongoose.connect('mongodb://hilary:'+process.env.MONGO_ATLAS_PW+'#localhost:27017/test').catch(err => console.log(err));
I then get this error in terminal:
{ MongoNetworkError: failed to connect to server [localhost:27017] on first connect [MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017]
at Pool.<anonymous> (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\topologies\server.js:505:11)
at Pool.emit (events.js:180:13)
at Connection.<anonymous> (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\pool.js:329:12)
at Object.onceWrapper (events.js:272:13)
at Connection.emit (events.js:180:13)
at Socket.<anonymous> (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\connection.js:245:50)
at Object.onceWrapper (events.js:272:13)
at Socket.emit (events.js:180:13)
at emitErrorNT (internal/streams/destroy.js:64:8)
at process._tickCallback (internal/process/next_tick.js:114:19)
name: 'MongoNetworkError',
message: 'failed to connect to server [localhost:27017] on first connect [MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017]' }

Answer 1

What worked was a slight variation from the mongoose docs,it was suggested on the Atlas server,for everyone who has Mongodb 3.4+ connect using the regular mongo db driver even when using mongoose, my connection string looks like:
mongoose.connect('mongodb+srv://hilary:<password>#node-rest-dnqwa.mongodb.net').catch(err => console.log(err));