What special identity group specifically includes any user account (except the Guest) logged into a computer or domain with a valid username and password?

Authenticated user is the correct answer to the following question.

Explanation:

If the users access our or others' accounts or system for some genuine purpose by the simple login or the logon process without hacking then those users are known as the Authenticated users. In simple words, Authenticated users are those genuine users who access by the login with username and password and so on.