You would need to go to that site to unlink your account. If you entered your login information on that site (please don't do this), go here:
https://store.steampowered.com/twofactor/manage

At the bottom, deauthorize other devices. Then change your password.

Well i wont do taht. i did deauthorize but the site is from ♥♥♥ and valve so safe

Originally posted by GanNL:

Well i wont do taht. i did deauthorize but the site is from ♥♥♥ and valve so safe

That blocked site and Valve do not collaborate. The fact that the link was removed should indicate that it has no connection to Steam.

well yeah. i dont know hot to delete site from steam. deauthorizeo only locked my phone from the authodicator

Originally posted by GanNL:

Well i wont do taht. i did deauthorize but the site is from ♥♥♥ and valve so safe

No, that site has nothing to do with Valve/Steam. It is a 3rd party site owned by some other company.

thanks. But how can i remove them from my account. I only used the site for a csgo skin

Steam does not offer a means to unlink your accounts from third-party web sites, you will need to unlink your account on their web site.

Originally posted by GanNL:

thanks. But how can i remove them from my account. I only used the site for a csgo skin

They are not on your account, nor have access to it. Steam is not facebook where sites have permission to do things on your account.

If you are worried about your password being saved, then you can change it.

thanks alot. btw i use steam authoticator. So i am save

It's a shame the 3rd party websites not only design the website in such a way we all fall for it.
But also that it's absolute ♥♥♥♥♥♥♥♥ that any 3rd party website uses or eventually falls down creating harsh policies they force us to agree to even access the website in the first place!

We should at least have the option to opt out... That's against my free human rights...

I am using a certain phone with certain OS. Ever since logging in problems have started today I had to do so many nerve-racking steps just to achieve securing my account to a satisfied result.

I saw other people complaining too so I just wish things could be safer like it was back in the day.:-(

Steam should add a way to deauthorize third-party apps and sites in the security section of the account settings.

They can't do that because all the info the website got from Steam was a permanent link to your profile (anyone can get that by visiting your profile) and a confirmation that you were logged in.

Now the website know what your Steam profile is and that the owner of the account used it to log and that can't be taken away from them or anyone.

Everyone has a steamID64 and everyone can see it and use it to get a link like this: http://steamcommunity.com/profiles/76561198010145176 (the ID is the numbers at the end)
You can find anyones on websites like this https://steamid.io and in other ways.