No `auth.log` on Omnibus installation

Hi there.
It just happend that a remote user is reporting not being able to access on our gitlab instance.

Becuase of this I started to look out at the logs. First the standard logs and then the application logs.

I found this very useful documentation about the topic and had fun checking almost each and every type of log. But when l looked for the auth.log inside the path /var/log/gitlab/gitlab-rails/, I did not find such file(s).

Any idea about what’s going on??

My gitlab version is:

gitlab-ce 12.7.5-ce.0