Has vs Have usage rule

If the subject is third-person singular (he, she, it, John, Sally, the cat, etc.), then use "Has", else use "Have" everywhere else.


E.g. 1) Users do not have password. (Users is third person plural, so use have)
E.g. 2) User does not has password. (User is third person singular, so use has)

E.g. 2) seems correct to me as per grammar rule but it does not sound good. Using "have" sounds better.
User does not have password.

Can someone please confirm, which one is correct and why?

User does not has password.
OR
User does not have password.