How to clean your system from grafana to start fresh?

Hi

I run macos and use brew and was using grafana some years ago. I forgot my admin password so I uninstalled, deleted all folders that I could find and installed again.

Admin, admin is not working
admin, password is not working

in the newly created files I see under security UNCOMMENTED lines where admin user is “admin” and his password is “admin”

I simply fail to understand why I cannot login. The brew service started normally everything is good even in the files still I cannot login

How do I even verify which file is the active one being used by brew-grafana?

Another question for me not clear https://grafana.com/docs/grafana/latest/installation/configuration/#macos

here it says create custom.ini and what content should I put in this file?