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ubuntu: Xorg without “-auth ….”. How to eliminate?

thats Xorg in processlist of ubuntu 20.04 with already open port 6000 (-listen tcp) :

/usr/lib/xorg/Xorg -listen tcp :0 -seat seat0 -auth /var/run/lightdm/root/:0 -listen tcp vt7 -novtswitch

How to get rid of -auth /var/run/lightdm/root/:0 ? – I don’t find any code in /etc/ recursively with “auth”, nor with “novtswitch” to just comment out “-auth …” parameter.
Who can help me?

Why? – Its LAN only, auth-security sucks. We have a communication system since 20 years that sends messages to desktop from second machine to many ubuntu desktops of users using e.g. export DISPLAY=10.0.0.9:10.0;messageApp & . Modern Xorg needs authentication, that sucks. Opening port 6000 is no longer enough.

tia
Eckard