post_install() {
    useradd -r -g daemon -d /usr/share/crate -s /bin/false crate
    chown -R crate:daemon /usr/share/crate
    chown -R crate:daemon /var/lib/crate
    chown -R crate:daemon /var/log/crate
}

post_remove() {
    userdel crate
}