[Twisted-Python] ftp client question

I have this code: creator = ClientCreator(reactor, FTPClient, self._user, self._passwd, self._passive, fail=self._Fail) cre = creator.connectTCP(self._host, self._port) cre.addCallback(self._ConnectionMade) cre.addErrback(self._Fail) I see that I can add a deferred on an connection error, that receive also the commands error ("wrong user", etc..), but is there a solution for add a callback for "user logged in" (code 230)? I find one, only that is very bad, so I'm asking if someone has already wrote this code in a more "twisted manner" Thanks Michele