We want to perform actions when a user is added to a group, and
possibly when a user is removed from a group. There is no hook point
for this currently in the zope.app.authentication code.
Fire events in the zope.app.authentication code when principals are
added and removed from groups.
from zope import interface
group = interface.Attribute('the group to which the principal
principal = interface.Attribute('the principal added')
group = interface.Attribute('the group from which the principal
principal = interface.Attribute('the principal removed')
In terms of implementation, it looks like
p are the methods that would fire the events.
I am aware of None.
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