[fysiks]

Because people come here to get the best advice, authenticating by SteamID is the best advice for authentication. However, it's often due to misunderstanding what is being requested or a lack of clarity or details in the request.

So, I probably misunderstood what you are asking. Are you asking for the equivalent functionality of users.ini using the "a" flag but not giving them admin access? I.e. if they have the right username and password, they'll get into the server but not have admin access?

If so, I believe this can still be done with users.ini, just set their access flags to "z" and their account flag to "a". No need to wait for someone to write a plugin or you can use this method until someone writes it for you. Win-win.