[Zope] logout

I am trying to provide a logout option for my users. After some googling, I found a few suggestions and tried them (I am using a standard acl user folder in zope 2.7) from the python API The following mostly works but requires manager permission (I traced this to RESPONSE.setBody call...) self._acctFolder.manage_zmi_logout(REQUEST, RESPONSE) What is the right way to logout a user? Thanks, John Hunter