[Zope] How to get the name of the authenticated user when writing cmf types ?

[Low Kian Seong]

Dear People,

I am coding a cmftype to be used together with Plone.
My question is why can i get the user using :

self.REQUEST['AUTHENTICATED_USER'].getUserName() 

but when i try :

AccessControl.SecurityManager.getUserName() 

it gives me an error saying that type 'module' is
uncallable ?

Any help or explanation is appreciated. Thank you.

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