// Sample Code. Download Contents by Requesting Singed URL
let callback: ARGAuthCallback = ARGAuthCallback(Success: { (url: String?) in
// Download Contents from Signed URL
}) { (code: ARGStatusCode) in
// error with status code
if let session = argSession, let auth = session.auth {
auth.requestSignedUrl(withUrl: zipFileUrl, itemTitle: title, itemType: type, completion: callback)