I need help-how can i authorize with other steam account?

I need help-how can i authorize with other steam account? Is there any way to do it?

You can only link one steam account to one faf account.

and how can I unlink the account

You cannot unlink the account. You need to use the account which is linked. You can reset your password on the website with your steam login if you lost access to the account.

Если я удалю аккаунт к которому привязан Стим, то к другому аккаунту смогу привязать?