Full Script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;
using TMPro;
 
public class PasswordChange : MonoBehaviour
{
    public TMP_InputField current_password;
    public TMP_InputField new_password;
    public TMP_InputField new_password_confirm;
    public TextMeshProUGUI username;
 
    public PopUpSystem popUp;
 
    public void ButtonChangePassword()
    {
        if (new_password.text != new_password_confirm.text)
        {
            popUp.OpenPopUp("ERROR!", "new password didn't match");
            return;
        }
 
        if (new_password.text.Length <= 6)
        {
            popUp.OpenPopUp("ERROR!", "Field cannot be empty");
        }
 
        if (current_password.text == "" || new_password.text == "" || new_password_confirm.text == "")
        {
            popUp.OpenPopUp("ERROR!", "Field cannot be empty");
            return;
        }
 
        StartCoroutine(Upload());
    }
 
    IEnumerator Upload()
    {
        WWWForm form = new WWWForm();
        form.AddField("playerUsername", username.text);
        form.AddField("currentPassword", current_password.text);
        form.AddField("newPassword", new_password.text);
 
        using (UnityWebRequest www = UnityWebRequest.Post("hidden", form))
        {
            yield return www.SendWebRequest();
 
            if (www.result != UnityWebRequest.Result.Success)
            {
                Debug.Log(www.error);
            }
            else
            {
                if(www.downloadHandler.text.Equals("Password Changed."))
                {
                    popUp.OpenPopUp("ERROR!", "Password Changed.");
                }
 
                if (www.downloadHandler.text.Equals("Wrong Current Password Entered."))
                {
                    popUp.OpenPopUp("ERROR!", "Wrong Current Password Entered.");
 
                }
 
                if (www.downloadHandler.text.Equals("Error! Please if you find the message contact us at admin@gementar.com"))
                {
                    popUp.OpenPopUp("ERROR!", "Error! Please if you find the message contact us at admin@gementar.com");
                }
 
                Debug.Log(www.downloadHandler.text);
 
            }
        }
    }
}

Full Script

using Sirenix.OdinInspector;
using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
 
public class RankingSystem : MonoBehaviour
{
    public GameObject RankParent;
    public GameObject rankFirst;
    public GameObject rankSecond;
    public GameObject rankThird;
    public GameObject rankNorm;
    public GameObject scoreUI;
 
    public hidden;
 
    bool toggleRankingList = true;
 
    public void ButtonOpenRankingList()
    {
        scoreUI.SetActive(true);
 
        if (toggleRankingList == false) return;
        toggleRankingList = false;
        var playerlist = hidden
 
        int i = 0;
        foreach (var item in playerlist)
        {
            GameObject newItem;
            if (i == 0)
            {
                newItem = Instantiate(rankFirst, this.transform);
                newItem.transform.SetParent(RankParent.transform);
            }
            else if (i == 1)
            {
                newItem = Instantiate(rankSecond, this.transform);
                newItem.transform.SetParent(RankParent.transform);
            }
            else if (i == 2)
            {
                newItem = Instantiate(rankThird, this.transform);
                newItem.transform.SetParent(RankParent.transform);
            }
            else
            {
                newItem = Instantiate(rankNorm, this.transform);
                newItem.transform.SetParent(RankParent.transform);
            }
 
 
            try
            {
            var split = item.Split(':');
 
            newItem.transform.Find("Text_Score").gameObject.GetComponent<TextMeshProUGUI>().SetText(split[1], 3.5f);
            newItem.transform.Find("Text_NickName").gameObject.GetComponent<TextMeshProUGUI>().SetText(split[0], 3.5f);
 
            if (i >= 3) newItem.transform.Find("Text_4").gameObject.GetComponent<TextMeshProUGUI>().SetText((i + 1).ToString(), 3.5f);
            }
            catch (System.Exception)
            {
                Destroy(newItem);
            }
 
            i++;
        }
 
    }
 
}