temporaryUrl() support for private S3 buckets

[frtess]

Hi, I was able to get a private bucket working with your package for uploads and deletes, but we can't see the images in the media hub library. From what I can see we would have to use s3's temporaryUrl() function on an object like:

Storage::disk('s3')->temporaryUrl($file_name, '+2 minutes')

Would this be possible to implement ? I think it's going to be more and more necessary, as aws are pushing hard for private buckets these days. (That sounds weird to say, right ? lol)

BTW, if someone has trouble with the "The bucket does not allow ACLs" error, for private buckets, you can fix this globally on the disk by removing the ACLs (the "options" bit):

        's3' => [
            'driver' => 's3',
            'key' => env('AWS_ACCESS_KEY_ID'),
            'secret' => env('AWS_SECRET_ACCESS_KEY'),
            'region' => env('AWS_DEFAULT_REGION'),
            'bucket' => env('AWS_BUCKET'),
            'url' => env('AWS_URL'),
            'endpoint' => env('AWS_ENDPOINT'),
            'use_path_style_endpoint' => env('AWS_USE_PATH_STYLE_ENDPOINT', false),
            'throw' => true,
            'visibility' => 'private', 
            'options' => [
                'ACL' => '' // NEEDED so S3 doesn't throw an error that AccessControlListNotSupported
            ]
        ],

Cheers