laravel upload pdf to AWS S3 bucket for authenticated users

i have application with below steps,

1. User signup and purchase the course
2. User submits the answer writing pdf file in application to AWS s3 storage. and i have a piece of code like below,

Upload to S3

$path = $request->file('answer_file')->store('pdffiles','s3');
 return $path;

In AWS i have created a bucket with default configuration and i have created a IAM user. S3 bucket is private and i have not touched other confgurations.

And to view the particular file i have a code like below,

$file_path = "pdffiles/filename.pdf";

        $client = Storage::disk('s3')->getDriver()->getAdapter()->getClient();

        $bucket = config('filesystems.disks.s3.bucket');
        $command = $client->getCommand('GetObject', [
                'Bucket' => $bucket,
                'Key' => $file_path  // file name in s3 bucket which you want to access
            ]);
        $request = $client->createPresignedRequest($command, '+5 minutes');

        $presignedUrl = (string) $request->getUri(); // Get the actual presigned-url

        $headers = [
            'Content-Type'        => 'application/pdf',
            'Content-Disposition' => 'attachment; filename="filename.pdf"',
            ];
        return Response::make($presignedUrl, 200, $headers);

So i am able to download the pdf file and also expiry thing also working fine. i am new to AWS s3 storage so i am wondering if this is good enough for a files where only authenticated users can access the files. It would be helpfull if anyone guide me if any extra things i should consider.