Can't create user for App42 Leaderboard

Hello.

I can't create a user in the App42 cloud with this script, what is wrong in it?

 using UnityEngine;
 using System.Collections;
 using com.shephertz.app42.paas.sdk.csharp.user;
 using com.shephertz.app42.paas.sdk.csharp;
 using System;
 using UnityEngine.UI;
  
 public class Reg : MonoBehaviour
 {
     public Text U;
     public Text P;
     public Text E;
     LeaderBoardConstants cons = new LeaderBoardConstants();
     public void Activate()
     {
         App42API.Initialize(cons.apiKey, cons.apiKey);
         UserService userS = App42API.BuildUserService();
         userS.CreateUser(U.text, P.text, E.text, new UnityCallBack());
     }
 }
  
  
 public class UnityCallBack : App42CallBack
 {
     public void OnSuccess(object response)
     {
         User user = (User)response;
         /* This will create user in App42 cloud and will return User object */
         App42Log.Console("userName is " + user.GetUserName());
         App42Log.Console("emailId is " + user.GetEmail());
     }
     public void OnException(Exception e)
     {
         App42Log.Console("Exception : " + e);
     }
  
 }

These codes are saved in one file that is called "Reg.cs" and the public function is used when player hits a button. Althogh this script shows exceptions but it doesn't show any coniformation and in the App42 user section in the app42 website, no new profile is shown.