Query the user for a system password. More information: https://www.freedesktop.org/software/systemd/man/systemd-ask-password.html.
systemd-ask-password "message"
systemd-ask-password --id=identifier "message"
systemd-ask-password --keyname=key_name "message"
systemd-ask-password --timeout=seconds "message"
systemd-ask-password --no-tty "message"
systemd-ask-password --no-output --keyname=key_name "message"