'(typ, [data]) = login_cram_md5(user, password)
Force use of CRAM-MD5 authentication.'

def login_cram_md5(self, user, password, **kw):

    (self.user, self.password) = (user, password)
    return self.authenticate('CRAM-MD5', self._CRAM_MD5_AUTH, **kw)
