def clearAuth(self):
        for (when, hostmask) in self.auth:
            users.invalidateCache(hostmask=hostmask)
        self.auth = []
See :meth:`.ColumnOperators.__neg__`.
dataset/ETHPy150Open ProgVal/Limnoria/src/ircdb.py/IrcUser.clearAuth--crossover with--dataset/ETHPy150Open zzzeek/sqlalchemy/lib/sqlalchemy/sql/default_comparator.py/_neg_impl