post_install() {
    getent group papermc > /dev/null 2>&1 || groupadd papermc
    getent passwd papermc > /dev/null 2>&1 || useradd -g papermc -d /srv/paper -s /bin/bash papermc
    chown -R papermc:papermc /srv/paper/
}

post_upgrade() {
    post_install $1
}

post_remove() {
    if getent passwd papermc >/dev/null 2>&1; then
        userdel papermc
    fi
    if getent group papermc >/dev/null 2>&1; then
        groupdel papermc
    fi
}