source/Assets/Scripts/AccountMenu/AccountHandler.cs

using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.SceneManagement;

public class AccountHandler : MonoBehaviour
{
    public static AccountHandler instance;
    public AccountLoggedIn accountLoggedIn;
    [SerializeField] private AccountLoggedOut accountLoggedOut;
    [SerializeField] private AccountLogin accountLogin;
    [SerializeField] private AccountRegister accountRegister;
    [SerializeField] private AccountChangeUsername accountChangeUsername;
    [SerializeField] private AccountChangePassword accountChangePassword;
    [SerializeField] private AccountRefreshLogin accountRefreshLogin;
    [SerializeField] internal AccountForgotDetails accountForgotDetails;

    void Awake()
    {
        instance = this;
    }

    void Start()
    {
        if (BazookaManager.Instance.GetAccountID() != null && BazookaManager.Instance.GetAccountName() != null && BazookaManager.Instance.GetAccountSession() != null)
        {
            SwitchPanel(0);
        }
        else
        {
            SwitchPanel(1);
        }
    }

    public void SwitchPanel(int panel)
    {
        switch (panel)
        {
            case 0:
                accountLoggedIn.gameObject.SetActive(true);
                accountLoggedOut.gameObject.SetActive(false);
                accountLogin.gameObject.SetActive(false);
                accountRegister.gameObject.SetActive(false);
                accountChangeUsername.gameObject.SetActive(false);
                accountChangePassword.gameObject.SetActive(false);
                accountRefreshLogin.gameObject.SetActive(false);
                accountForgotDetails.gameObject.SetActive(false);
                break;
            case 1:
                accountLoggedIn.gameObject.SetActive(false);
                accountLoggedOut.gameObject.SetActive(true);
                accountLogin.gameObject.SetActive(false);
                accountRegister.gameObject.SetActive(false);
                accountChangeUsername.gameObject.SetActive(false);
                accountChangePassword.gameObject.SetActive(false);
                accountRefreshLogin.gameObject.SetActive(false);
                accountForgotDetails.gameObject.SetActive(false);
                break;
            case 2:
                accountLoggedIn.gameObject.SetActive(false);
                accountLoggedOut.gameObject.SetActive(false);
                accountLogin.gameObject.SetActive(true);
                accountRegister.gameObject.SetActive(false);
                accountChangeUsername.gameObject.SetActive(false);
                accountChangePassword.gameObject.SetActive(false);
                accountRefreshLogin.gameObject.SetActive(false);
                accountForgotDetails.gameObject.SetActive(false);
                break;
            case 3:
                accountLoggedIn.gameObject.SetActive(false);
                accountLoggedOut.gameObject.SetActive(false);
                accountLogin.gameObject.SetActive(false);
                accountRegister.gameObject.SetActive(true);
                accountChangeUsername.gameObject.SetActive(false);
                accountChangePassword.gameObject.SetActive(false);
                accountRefreshLogin.gameObject.SetActive(false);
                accountForgotDetails.gameObject.SetActive(false);
                break;
            case 4:
                accountLoggedIn.gameObject.SetActive(false);
                accountLoggedOut.gameObject.SetActive(false);
                accountLogin.gameObject.SetActive(false);
                accountRegister.gameObject.SetActive(false);
                accountChangeUsername.gameObject.SetActive(true);
                accountChangePassword.gameObject.SetActive(false);
                accountRefreshLogin.gameObject.SetActive(false);
                accountForgotDetails.gameObject.SetActive(false);
                break;
            case 5:
                accountLoggedIn.gameObject.SetActive(false);
                accountLoggedOut.gameObject.SetActive(false);
                accountLogin.gameObject.SetActive(false);
                accountRegister.gameObject.SetActive(false);
                accountChangeUsername.gameObject.SetActive(false);
                accountChangePassword.gameObject.SetActive(true);
                accountRefreshLogin.gameObject.SetActive(false);
                accountForgotDetails.gameObject.SetActive(false);
                break;
            case 6:
                accountLoggedIn.gameObject.SetActive(false);
                accountLoggedOut.gameObject.SetActive(false);
                accountLogin.gameObject.SetActive(false);
                accountRegister.gameObject.SetActive(false);
                accountChangeUsername.gameObject.SetActive(false);
                accountChangePassword.gameObject.SetActive(false);
                accountRefreshLogin.gameObject.SetActive(true);
                accountForgotDetails.gameObject.SetActive(false);
                break;
            case 7:
                accountLoggedIn.gameObject.SetActive(false);
                accountLoggedOut.gameObject.SetActive(false);
                accountLogin.gameObject.SetActive(false);
                accountRegister.gameObject.SetActive(false);
                accountChangeUsername.gameObject.SetActive(false);
                accountChangePassword.gameObject.SetActive(false);
                accountRefreshLogin.gameObject.SetActive(false);
                accountForgotDetails.gameObject.SetActive(true);
                break;
        }
        foreach (CustomColorObject customColorObject in FindObjectsByType<CustomColorObject>(FindObjectsSortMode.None)) customColorObject.SetColor();
    }

    async void Update()
    {
        if (Keyboard.current.escapeKey.wasPressedThisFrame)
        {
            if (accountChangePassword.gameObject.activeSelf || accountChangeUsername.gameObject.activeSelf || accountRefreshLogin.gameObject.activeSelf) SwitchPanel(0);
            else if (accountLogin.gameObject.activeSelf || accountRegister.gameObject.activeSelf) SwitchPanel(1);
            else if (accountForgotDetails.gameObject.activeSelf) accountForgotDetails.forgotDetailsBackButton.onClick.Invoke();
            else await SceneManager.LoadSceneAsync("MainMenu");
        }
    }
}