func attemptLogin() {

        let url:URL = URL(string: endpoint+"/LoginNew")!
        let session = URLSession.shared

        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData

        let postString = "username="+txtUsername.text! + "; password="+txtPassword.text!
        request.httpBody = postString.data(using: String.Encoding.utf8)

        let task = session.dataTask(with: request as URLRequest) {
            (
            data, response, error) in

            guard let data = data, let _:URLResponse = response, error == nil else {
                print("error")
                return
            }

            let dataString =  String(data: data, encoding: String.Encoding.utf8)
            print(dataString)

        }

        task.resume()

    }

let postString = "username="+txtUsername.text! + "; password="+txtPassword.text!
        request.httpBody = postString.data(using: String.Encoding.utf8)