Comment by seba_dos1

Kinda hard to not come up with it when setting up your credentials is the first thing git wants you to do before you can commit anything. BTW. You can also overwrite them by command line switches per commit instead of setting environment variables.

I guess it's worth noting here that you can sign your commits with GPG: https://git-scm.com/book/tr/v2/Git-Tools-Signing-Your-Work