register in c#

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class DataInserter : MonoBehaviour
{

    string CreateUserURL = "http://xxnorxx.alwaysdata.net/insertUser.php";

    public string inputUsername = "";
    public string inputPassword = "";


    public Canvas main;
    public Canvas register;

    public InputField IFUsername;
    public InputField IFPassword;


    // Use this for initialization
    void Start ()
    {

    }

    // Update is called once per frame
    void Update ()
    {
        if (regPress)
        {
            CreateUser(inputUsername, inputPassword);

            inputUsername = "";
            inputPassword = "";

            main.enabled = true;
            register.enabled = false;

            regPress = false;
        }
    }

    public void CreateUser(string username, string password)
    {
        WWWForm form = new WWWForm();
        form.AddField("usernamePost", username);
        form.AddField("passwordPost", password);

        WWW www = new WWW(CreateUserURL, form);
    }

    bool regPress = false;

    public void btnReg()
    {


        if (IFUsername.text != "" && IFPassword.text != "" && IFUsername.text != "" && IFPassword.text != "")
        {
            inputUsername = IFUsername.text;
            inputPassword = IFPassword.text;

            IFUsername.text = "";
            IFPassword.text = "";
            regPress = true;
        }
    }

}