This will auto Sign up when someone in your party signs up for a group, skips the "accept" and "roles" section, will work for any type of signups, all PVP, PVE, Dungeons, LFG, LFR.
I did NOT write the code for this, i had a random party member months ago that shared it with me.
You will need to set your roles in the normal dungeon finder for signing for PvE and in the BG LFG for any arena or Rated BG signups,
I dont know how to do updated or modify this code so if someone knows someone that might be able to keep it up to date please contact me here or discord