HELP Steam Error:No SteamUser

well it says:

Steam Error:No Steamuser

-Make sure that steam is up to date
-Try restarting your PC
-Try Garry’s Mod -> Delete Local Content

i’ve been trying many solutions offered by people in internet(Restart steam,End process,Etc) but it didn’t work?
anyone here could help?

Where do you get this error? When you start Garry’s Mod or when you join a server? You’ll want to make sure Steam isn’t blocked by any firewall or antivirus

this happen when i’m starting gmod,and i currently dont have any antivirus installed.