def addUser(self, username=None, password=None, full_name=None,
                email=None, nick=None, ua_dict={}):

        def thd(conn):
            transaction = conn.begin()

            # insert ua_dict info, defaulting to False where key not given
            if not ua_dict:
                ua_dict = self.defaultAuthz()
            else:

            # ...

            transaction.commit()
        d = self.db.pool.do(thd)
        return d