On Debian10/KDE a libvirt-qemu user is added and shown on the login screen
I didn't create this user - I think it was added by installing the "Virtual Machine manager" (virt-manager) on Debian10/KDE, or more specifically by libvirt-daemon-system
.
grep -E 'libvirt|qemu' /etc/passwd
returns libvirt-qemu:x:6xxxx:1xx:Libvirt Qemu,,,:/var/lib/libvirt:/usr/sbin/nologin
KDE's User Manager doesn't show the account but it's displayed on the login screen on the left of the actual user account (not when locking the screen but at least after booting). I don't have a file /var/lib/AccountsService/users/libvirt-qemu like described in a solution to the 2017 question here and could not find a bug report here.
This useraccount shouldn't be displayed as a normal user if adding it is indeed needed/useful.
If the solution is to not remove the user but to hide it by creating the /users/libvirt-qemu file why isn't that done when the user is set up already? If the user is necessary I'd find it strange that iirc it was only added after installing virt-manager but not after installing and using aqemu.
I asked about it here where users cas and A.B. made some helpful comments. A.B. suggested that "libvirt-qemu is a system account but with a specific UID not in the default system range ( < 500 or something like this): grep LIBVIRT_QEMU_UID /var/lib/dpkg/info/libvirt*
" (it's over 60000). Changing the UID or creating that config-file containing SystemAccount=true
upon installation seem to be two ways of solving this issue.