Error registering user MongooseError: Operation `users.findOne()` buffering timed out after 10000ms at Timeout

MongoDB Atlas
,
4

Here you can see your connection string in step 3. Look that you must complete the connection string with the password of your user db.

You will use this connection on your code to connect with your cluster. Something like

mongoose
  .connect(YOUR_CONNECTION_STRING, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  })