How to use the pantalaimon.log.logger.warn function in pantalaimon

self.store = PanStore(self.data_dir)
        accounts = self.store.load_users(self.name)

        for user_id, device_id in accounts:
            if self.conf.keyring:
                try:
                    token = keyring.get_password(
                        "pantalaimon", f"{user_id}-{device_id}-token"
                    )
                except RuntimeError as e:
                    logger.error(e)
            else:
                token = self.store.load_access_token(user_id, device_id)

            if not token:
                logger.warn(
                    f"Not restoring client for {user_id} {device_id}, "
                    f"missing access token."
                )
                continue

            logger.info(f"Restoring client for {user_id} {device_id}")

            pan_client = PanClient(
                self.name,
                self.store,
                self.conf,
                self.homeserver_url,
                self.send_queue,
                user_id,
                device_id,
                store_path=self.data_dir,

self.store = PanStore(self.data_dir)
        accounts = self.store.load_users(self.name)

        for user_id, device_id in accounts:
            if self.conf.keyring:
                try:
                    token = keyring.get_password(
                        "pantalaimon", f"{user_id}-{device_id}-token"
                    )
                except RuntimeError as e:
                    logger.error(e)
            else:
                token = self.store.load_access_token(user_id, device_id)

            if not token:
                logger.warn(
                    f"Not restoring client for {user_id} {device_id}, "
                    f"missing access token."
                )
                continue

            logger.info(f"Restoring client for {user_id} {device_id}")

            pan_client = PanClient(
                self.name,
                self.store,
                self.conf,
                self.homeserver_url,
                self.send_queue,
                user_id,
                device_id,
                store_path=self.data_dir,

def pan_decrypt_event(self, event_dict, room_id=None, ignore_failures=True):
        # type: (Dict[Any, Any], Optional[str], bool) -> (bool)
        event = Event.parse_encrypted_event(event_dict)

        if not isinstance(event, MegolmEvent):
            logger.warn(
                "Encrypted event is not a megolm event:"
                "\n{}".format(pformat(event_dict))
            )
            return False

        if not event.room_id:
            event.room_id = room_id

        try:
            decrypted_event = self.decrypt_event(event)
            logger.info("Decrypted event: {}".format(decrypted_event))

            event_dict.update(decrypted_event.source)
            event_dict["decrypted"] = True
            event_dict["verified"] = decrypted_event.verified

if not event.room_id:
            event.room_id = room_id

        try:
            decrypted_event = self.decrypt_event(event)
            logger.info("Decrypted event: {}".format(decrypted_event))

            event_dict.update(decrypted_event.source)
            event_dict["decrypted"] = True
            event_dict["verified"] = decrypted_event.verified

            return True

        except EncryptionError as error:
            logger.warn(error)

            if ignore_failures:
                event_dict.update(self.unable_to_decrypt)
            else:
                raise

            return False

return None

    async def send_info(message_id, pan_user, code, string):
        message = DaemonResponse(message_id, pan_user, code, string)
        await send_queue.put(message)

    while True:
        message = await receive_queue.get()
        logger.debug(f"Router got message {message}")

        proxy = find_proxy_by_user(message.pan_user)

        if not proxy:
            msg = f"No pan client found for {message.pan_user}."
            logger.warn(msg)
            await send_info(
                message.message_id, message.pan_user, "m.unknown_client", msg
            )

        await proxy.receive_message(message)