'xset' not authorized

[ofthecentury]

I cannot turn off dpms so my screen doesn't shut
off after 10 mins (screensaver off already).
When running 'xset s off -dpms' I am getting an
error: 'Authorization required, but no
authorization protocol specified.'
I tried running xhost si:localuser:root, but xhost
gets the same error.
(OpenBSD 7.5, Xfce4 and xfce4-terminal).