Here’s what the Arch wiki says about Hiding system and services users, at:
To prevent system users from showing-up in the login, install the optional dependency accountsservice, or add the user names to /etc/lightdm/users.conf under hidden-users.
I can edit /etc/lightdm/users.conf, but users.conf clearly warns me:
NOTE: If you have AccountsService installed on your system, then LightDM will use this instead and these settings will be ignored
Unfortunately, I can’t find a way of configuring AccountsService, or much about it except that it’s listened as an optional dependency. Can I safely uninstall it? Is there a way to configure it to hide users?