This is a shortcut for getting the sns_token, as a post data of
        request body.

def get_ticket_for_sns_token(self):
        """This is a shortcut for getting the sns_token, as a post data of
        request body."""
        self.logger.info("%s\t%s" % (self.request_method, self.request_url))
        return {
            "openid": self.get_openid(),
            "persistent_code": self.get_persistent_code(),
        }