[Zope-CMF] how do I get autenticated user

[Robert Rottermann]

Hi there,

I try to get the authenticated user from within breadcrumbs.py
I tried it as follows but it does not work.

Thanks 
Robert

portal = context.portal_url.getPortalObject()
pm =  context.getToolByName(portal, 'portal_membership')
member = pm.getAuthenticatedMember()

if(mtool.getAuthenticatedMember.hasRole( context, ['Mitarbeiter'] )):
   root_url = "%s/folder_contents" % portal_url
else:
   root_url = portal_url