ACProgressHUD.shared.showHUD()

    DispatchQueue.global(qos: .background).async {
        //http://easydatasearch.com/easydata1/movie/paytm/generateChecksum.php

        let myUrl = URL(string: GlobalUrl.BaseUrl + "generateChecksum.php?");
        var request = URLRequest(url:myUrl!)
        request.httpMethod = "POST"

        let postString = "ORDER_ID=001"

        let userName = "admin"
        let password = "admin"
        var _: Error? = nil
        let authStr = "(userName):(password)"
        let authData: Data? = authStr.data(using: .ascii)
        let authStrData = String(data: authData?.base64EncodedData(options: .endLineWithLineFeed) ?? Data(), encoding: .ascii)
        let authValue = "Basic (authStrData!)"
        request.addValue(authValue, forHTTPHeaderField: "Authorization")

        request.httpBody = postString.data(using: String.Encoding.utf8);
        let task = URLSession.shared.dataTask(with: request) { (data: Data?, response: URLResponse?, error: Error?) in

            if error != nil
            {
                ACProgressHUD.shared.hideHUD()
                let alert = UIAlertController(title: "", message: "Something went wrong", preferredStyle:     UIAlertControllerStyle.alert)
                alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
                self.present(alert, animated: true, completion: nil)
                print(error!)

                return
            }

            print("response = (response!)")

            do {



               let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary

                DispatchQueue.main.async {

                    if let parseJSON = json {

                        print(parseJSON)
                        let status =   parseJSON["payt_STATUS"] as! String

                        if status == "1"{
                            ACProgressHUD.shared.hideHUD()
                            self.checkSumStr = parseJSON["CHECKSUMHASH"] as? String ?? ""
                            //self.VerifyCheckSum()
                        }else{
                            ACProgressHUD.shared.hideHUD()
                            let massageStr = parseJSON["msg"] as! String
                            let alert = UIAlertController(title: "ERROR", message: massageStr, preferredStyle:     UIAlertControllerStyle.alert)
                            alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
                            self.present(alert, animated: true, completion: nil)

                        }
                    }
                }
            }
            catch {
                ACProgressHUD.shared.hideHUD()

                let alert = UIAlertController(title: "", message: "Something went wrong", preferredStyle:     UIAlertControllerStyle.alert)
                alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
                self.present(alert, animated: true, completion: nil)
                print(error)
            }
        }
        task.resume()
    }
}