Gmod wont verify

ok so i reinstalled gmod today to play with a few old buddies, went to download addons and i saw the verify thing, i was like, ok, followed the process, but it keeps saying

We found your steam account and found the code - but it appears that you don’t own Garry’s Mod.
This means:
• You are mistaken and have verified the wrong account?
• You have pirated Garry’s Mod (You didn’t pay for it, you have downloaded it illegally).

i have not pirated GMod,

wasnt sure wether to post this in the help and support section or the section

You will have better luck in this thread.

reading through that now


if a mod could please delete this thread.