Downloading private files

Good evening, everyone, Is it possible to obtain a protected url to download files on a private space? I also tried with Flysystem to distribute the files for download, but I can’t, they’re all corrupted.

        $client = new S3Client([
            'credentials' => [
                'key'    => '',
                'secret' => '/pn8IBKqObu7TAM',
            ],
            'region' => '',
            'version' => 'latest',
            'endpoint' => 'https://ams3.digitaloceanspaces.com',
        ]);

        $adapter = new AwsS3Adapter($client, '');

        $filename = 'toto.png';
        $fs = new Filesystem($adapter);
        $downloadable_file_stream = $fs->readStream('sounds/toto.png');
        $downloadable_file_stream_contents = stream_get_contents($downloadable_file_stream);

        $response = new StreamedResponse();
        $response->setCallback(function () use ($downloadable_file_stream_contents) {
            echo $downloadable_file_stream_contents;
            flush();
        });
        return $response->send();

Thank you very much for your helping. Guillaume