def migrate(
        self,
        host: str,
        port: int,
        keys: KeysT,
        destination_db: int,
        timeout: int,
        copy: bool = False,
        replace: bool = False,
        auth: Optional[str] = None,
    ) -> Awaitable:
        """
        Migrate 1 or more keys from the current Redis server to a different
        server specified by the ``host``, ``port`` and ``destination_db``.

        The ``timeout``, specified in milliseconds, indicates the maximum
        time the connection between the two servers can be idle before the
        command is interrupted.

        If ``copy`` is True, the specified ``keys`` are NOT deleted from
        the source server.

        If ``replace`` is True, this operation will overwrite the keys
        on the destination server if they exist.

        If ``auth`` is specified, authenticate to the destination server with
        the password provided.
        """
        keys = list_or_args(keys, [])
        if not keys:
            raise DataError("MIGRATE requires at least one key")
        pieces: List[EncodableT] = []
        if copy:
            pieces.append(b"COPY")
        if replace:
            pieces.append(b"REPLACE")
        if auth:
            pieces.append(b"AUTH")
            pieces.append(auth)
        pieces.append(b"KEYS")
        pieces.extend(keys)
        return self.execute_command(
            "MIGRATE", host, port, "", destination_db, timeout, *pieces
        )

        Migrate 1 or more keys from the current Redis server to a different
        server specified by the ``host``, ``port`` and ``destination_db``.

        The ``timeout``, specified in milliseconds, indicates the maximum
        time the connection between the two servers can be idle before the
        command is interrupted.

        If ``copy`` is True, the specified ``keys`` are NOT deleted from
        the source server.

        If ``replace`` is True, this operation will overwrite the keys
        on the destination server if they exist.

        If ``auth`` is specified, authenticate to the destination server with
        the password provided.
        
aioredis/client.py