[Typo3-dev] user management logic

[Leendert Brouwer [Netcreators]]

Hi list,

I want to extend parts of the core where user management takes place, such
as adding a user, editing a user, deleting a user. My intention is to let
typo3 cooperate with a third-party user authentication system transparently.
Does anyone know where in the core this logic is present, as to know what to
extend exactly?

Thanks in advance,

Leendert Brouwer
Netcreators