def url(key, expires_in:, disposition:, filename:, content_type:)
      instrument :url, key: key do
        options = {
          expires_in: expires_in,
          content_type: content_type,
          disposition: disposition,
          filename: filename
        }
        signed_download_url_for_public_id(key, options)
      end
    end
def url(key, expires_in:, disposition:, filename:, content_type:)
      instrument :url, key: key do
        options = {
          expires_in: expires_in,
          content_type: content_type,
          disposition: disposition,
          filename: filename
        }
        signed_download_url_for_public_id(key, options)
      end
    end
Returns a signed, temporary URL for the file at the +key+. The URL will be valid for the amount
 of seconds specified in +expires_in+. You must also provide the +disposition+ (+:inline+ or +:attachment+),
 +filename+, and +content_type+ that you wish the file to be served with on request.