def credentialsChanged(password, REQUEST=None):
    """ Notify the authentication mechanism that this user has
            changed passwords.

        o The authentication mechanism can use this notification to update
          the authentication cookie.

        o Note that this call should *not* cause any change at all to user
          databases.

        o ???:  should be an event.

        o ???:  should this be in scope for this tool?  Or should it be
                done by the view class for the password update view?

        Permission:  Public # ????
        """
