Document Sign in credentials

### What piece of documentation is affected? It would be nice to have the credentials for sign in in the quick start doc. I found it in the env file though. ### What part(s) of the article would you like to see updated? Quick start ### Additional Information _No response_ ### Acknowledgements - [X] My issue title is concise, descriptive, and in title casing. - [X] I have searched the existing issues to make sure this feature has not been requested yet. - [X] I have provided enough information for the maintainers to understand and evaluate this request.