How do you deauthorize using Apple's Authorization Services?

After preAuthorizing using AuthorizationCopyRights(...) how do I unauthorize it using Apple's Authorization Services?

EDIT: Alright, I feel rather unintelligent now. I used to think that I shouldn't free the authorization reference and keep it for future use, but apparently I should make a new on开发者_Go百科e AuthorizationCreate(...) every time I want the user to enter credentials?

AuthorizationFree(authRef, kAuthorizationFlagDestroyRights)

as documented in the Authorization.h header