On Mac print servers (systems that you set up as a primary or secondary PaperCut server), PaperCut creates a host user or service account. This account is used to run the various services and processes required to track printing. Running as a service account allows the administrator to manage access control and have more comfort in the security of the system than if those processes ran as
root (a security faux pas).
Prior to version 13.1, this service account would be displayed on the login screen of Mac print servers by default, despite it not being a regular user account that anyone could log in as (it has no password). In version 13.1 and newer this account is hidden from the login screen by default.
To hide this user from the login screen in versions prior to 13.1 the following command can be used in a Terminal window:
sudo defaults write /Library/Preferences/com.apple.loginwindow HiddenUsersList -array-add 'papercut'
Keywords: PaperCut NG Host User, hide welcome screen user