'Add information to the knowledge I have about the user. This is
for Virtual organizations.
:param name_id: The subject identifier
:return: A possibly extended knowledge.'

def add_vo_information_about_user(self, name_id):

    ava = {}
    try:
        (ava, _) = self.users.get_identity(name_id)
    except KeyError:
        pass
    if self.vorg:
        if self.vorg.do_aggregation(name_id):
            ava = self.users.get_identity(name_id)[0]
    return ava
