Solution found here
Edit run file /etc/sv/agetty-tty1/run by changing in the 9th line:
GETTY_ARGS="-a paul --noclear"
Change name to your own username of course.
@pablokal RE:autologin: should mention that any changes made to /etc/sv/agetty-tty1/run will be lost each time package runit-void is updated.
i decided to just run lxdm autostart instead, to save having to fix this each time.
To log in to one account automatically on startup, without providing a password, find the line in
/etc/lxdm/lxdm.confthat looks like this:
Be sure to edit your sudoers file in /etc/
# EDITOR=nano visudo
with this permission
paul ALL=(ALL) NOPASSWD: ALL