When using a protected repository it is common atm to put username:password into a deb repo definition into a /etc/apt/sources.list.d/*list. The line are generated by UCRVs documented in https://docs.software-univention.de/developer-reference/5.0/en/repositories.html#integrate-with-ucsucr This attempt now generates a warning during "apt update": N: Die Verwendung von apt_auth.conf(5) sollte gegenüber der Methode bevorzugt werden, Login-Informationen direkt in den sources.list(5)-Abschnitt für »https://service.software-univention.de/ univention-repository/apt/99999/5.0/maintained/component« einzutragen. N: Die Verwendung von apt_auth.conf(5) sollte gegenüber der Methode bevorzugt werden, Login-Informationen direkt in den sources.list(5)-Abschnitt für »https://service.software-univention.de/ univention-repository/apt/99999/5.0/maintained/component« einzutragen. this affects our own customer repositories as well as protected repos used by partners like OX or Kopano.
I do not think, this is only a feature request, it is a bug, because you need a workaround to enable protected repositories
Seen today in a customer environment. Searched for that bug with auth, apt and apt_auth. Hope I would find the bug from now with that keywords :D