When I run nodemon server I get the error "bad auth Authentication failed. [nodemon] app crashed - waiting for file changes before starting..."

Question

I have been working on a node.js / react app and I uploaded it to heroku. About a month ago it worked (locally and on heroku). Now it doesn't. I seem to get the same error when I run nodemon server even when I download old commits of the app (which did work). Terminal does this:

TDI-MacBook-Air:udemy-MERN-FromGithub bob$ nodemon server
[nodemon] 1.19.0
[nodemon] to restart at any time, enter `rs`
[nodemon] watching: *.*
[nodemon] starting `node server.js`
Server started on Port 5000
bad auth Authentication failed.
[nodemon] app crashed - waiting for file changes before starting...

1. downloaded old an old commit from my githum https://github.com/PaulAyling/COURSE-MernStackFrontToBack

2. ran at the terminal: npm install

3. Ran at terminal nodemon server (got the same error as before).

4. I tried connecting to the mongo database with postman and got the following error:

Could not get any response
There was an error connecting to http://localhost:5000/api/posts.
Why this might have happened:
The server couldn't send a response:
Ensure that the backend is working properly
Self-signed SSL certificates are being blocked:
Fix this by turning off 'SSL certificate verification' in Settings > General
Proxy configured incorrectly
Ensure that proxy is configured correctly in Settings > Proxy
Request timeout:
Change request timeout in Settings > General

After reading the error I changed the SSL Certificate verification to off but it did not fix the problem

Theres quite alot of code - not sure what the most usefull files would be - but it did work a month ago.

The full code is here: https://github.com/PaulAyling/COURSE-MernStackFrontToBack

If you want specific code let me know and I'll post it.

Expecting the server to run. Error is;

TDI-MacBook-Air:udemy-MERN-FromGithub bob$ nodemon server
[nodemon] 1.19.0
[nodemon] to restart at any time, enter `rs`
[nodemon] watching: *.*
[nodemon] starting `node server.js`
Server started on Port 5000
bad auth Authentication failed.
[nodemon] app crashed - waiting for file changes before starting...

Answer 1

In your /config/default.json or /config/production.json there is an object mongoURI .

Replace the url with with user password and username not your account name and account password that currently functions.

You have probably deleted that user or changed the password.

Also I tried launching in my local machine and it worked without any trouble.

Answer 2

If your username has special characters then change the username with URL encoded format. you will find URL encoding here !

I will recommend changing the password to eliminate special chars.

As per the Mongo DB website :

Special Characters in Connection String Password

If your password includes special characters, and you are using your password in a connection string URI, encode the special characters.

NOTE

The following characters must be converted using percent-encoding if included in a username or password:

: /? # [ ] @

For example, if your password in plain text is p@ssw0rd'9',: you need to encode your password as:

p%40ssw0rd%279%27%21

The above solution worked for me.