Mongoose is not connecting MongoDB Atlas - node.js

Question

This is the first time I use MongoDB Atlas to work with Mongo, and while trying to connect, that's the error I get:
Error: connect ECONNREFUSED 3.209.60.172:27017
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1054:14) {
name: 'MongoNetworkError',
errorLabels: [ 'TransientTransactionError' ],
[Symbol(mongoErrorContextSymbol)]: {}
}
This is my code:
const express = require('express');
const mongoose = require('mongoose');
const app = express();
mongoose.connect('mongodb+srv://johnnybox:<password>#cluster0-cgxqx.mongodb.net/test?retryWrites=true&w=majority', {
useNewUrlParser: true
}).then(() => console.log('MongoDB Connected...'))
.catch(err => console.log(err));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use(require('./routes'));
app.listen(3331);
ps* I'm not missing my credentials
Already looked for a solution here but there's nothing similar to my problem.
My whitelist:

Answer 1

try this
mongoose
.connect(
'mongodb+srv://{my_user}:{mypass}#johnnybox-cgxqx.mongodb.net/johnnybox?retryWrites=true&w=majority',
{ useNewUrlParser: true }
)
.then(() => console.log('MongoDB Connected...'))
.catch(err => console.log(err));

Answer 2

Try adding your IP Address in the mongo atlas IP Whitelist.
Otherwise accept every connections if you don't need secure connection.

Answer 3

A new answer to the new error:
According to this answer, which had the same exact error, that is:
'MongoNetworkError',
errorLabels: [ 'TransientTransactionError' ],
[Symbol(mongoErrorContextSymbol)]:
Add your current IP to whiteList following "clusters/security/whitelist" in MongoDB website.
I'm sorry, I spent at least an hour to solve this. That's all I can do.
Old answer addressing the former error (he fixed this part, but still got a new error):
If you read the error log carefully it says:
UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block
That means you needed to add catch() to your mongoose connection:
mongoose.connect({some code}).then({some code}).catch(err => console.log(err))

Answer 4

I tried to run this code at home and it worked perfectly!
So it was something here in my office, after some testing, the problem was with the connection port that was locked.
Take a look:
Error: connect ECONNREFUSED 3.209.60.172:27017
Note that it connects to the port 27017
**The Ip is random, so it changes after every requisition.
After my Sd opened this port, everything worked properly!!
Thanks so much for your help guys!

Answer 5

For those of you who tried various URIs the only thing that got it working here is to Add you IP vs allow the access from anywhere. Hope that saves you some time.