This is what I have in /etc/lightdm/lightdm.conf
[SeatDefaults] greeter-session=lightdm-gtk-greeter user-session=xubuntu greeter-hide-users=true allow-guest=false
This is what I have in /etc/lightdm/ lightdm. conf
[SeatDefaults] session= lightdm- gtk-greeter xubuntu hide-users= true
greeter-
user-session=
greeter-
allow-guest=false