public function create(
        string $title,
        string $description,
        $amount,
        array $optional = []
    ): Response {
        $body = \array_merge(\compact('title', 'description', 'amount'), $optional);

        list($headers, $stream) = $this->prepareMultipartRequestPayloads([], $body);

        return $this->stream('POST', 'open_collections', $headers, $body);
    }