Passing Json to ASP web site

I am learning swift and I am trying to pass data to ASP using json

This is my code

and I am getting the following error where I am instantiation json(line 43)

fatal error: 'try!' expression unexpectedly raised an error: Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}: file /Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-700.1.101.15/src/swift/stdlib/public/

import UIKit

class RegisterViewController: UIViewController {

   @IBOutlet weak var userEmailTextField: UITextField!
   @IBOutlet weak var userPasswordTextField: UITextField!
   @IBOutlet weak var repeatUserPasswordTextField: UITextField!
   override func viewDidLoad() {
   super.viewDidLoad()

   /
  }

   override func didReceiveMemoryWarning() {
   super.didReceiveMemoryWarning()
   /
  }


   @IBAction func registerButtonTouched(sender: AnyObject) {

   let userEmail = userEmailTextField.text;
   let userPassword = userPasswordTextField.text;
   let userRepeatPassword = repeatUserPasswordTextField.text;

   if(userEmail!.isEmpty || userPassword!.isEmpty || userRepeatPassword!.isEmpty)

  displayMyAlertMessage("All fields are requred");
   return;

   if(userPassword != userRepeatPassword)

  displayMyAlertMessage("Passwords do not match");
   return;

   /
   let myUrl = NSURL(string: "https:/
   let request = NSMutableURLRequest(URL:myUrl!);
  
   if error != nil {
  print("error=\(error)")
   return
   let json = try! NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as? NSDictionary
  print("Test")

   if let parseJSON = json{
   let resultValue = parseJSON["status"] as? String
  print("result: \(resultValue)")

   var isUserRegistered:Bool = false;
   if(resultValue == "Success") {isUserRegistered = true;}

   var messageToDisplay:String = parseJSON["message"] as! String;

   if(!isUserRegistered)

  messageToDisplay = parseJSON["message"] as! String;

   let myAlert = UIAlertController(title: "Alert", message: messageToDisplay, preferredStyle: UIAlertControllerStyle.Alert);

   let okAction = UIAlertAction(title:"Ok", style: UIAlertActionStyle.Default){ action in
   self.dismissViewControllerAnimated(true, completion: nil);

   self.presentViewController(myAlert, animated: true, completion: nil)

   func displayMyAlertMessage(userMessage:String)

   let myAlert = UIAlertController(title: "Alert", message: userMessage, preferredStyle: UIAlertControllerStyle.Alert);

   let okAction = UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil)

   self.presentViewController(myAlert, animated:true, completion:nil);