post_install() {
    echo ":: Setting lightdm-slick-greeter as greeter session on /etc/lightdm/lightdm.conf"
    sed -i '/^greeter-session=/c\greeter-session=lightdm-slick-greeter' /etc/lightdm/lightdm.conf
}

post_remove() {
    echo ":: Removing greeter session on /etc/lightdm/lightdm.conf. Set another greeter session if you plan to keep using lightdm!!"
    sed -i '/^greeter-session=lightdm-slick-greeter/c\greeter-session=' /etc/lightdm/lightdm.conf
}