This is my home controller.... Where I am passing value in query string.......

using IdentityModel.Client;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Newtonsoft.Json;
using NLog;
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Http;
using Newtonsoft;
using System.Text.RegularExpressions;
using System.Net.Http.Headers;
using System.Diagnostics;
using Newtonsoft.Json.Linq;
using System.IO;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Options;

namespace MYApp.Controllers
{

public class HomeController : Controller
{
   
   
   
    Logger logger = LogManager.GetCurrentClassLogger();
    private string clientId = "";
    private string clientSecret = "";
    
    private ModelStateDictionary ValidationMessages { get; set; }

     

    public class UserInfo

    {
        public string Addresses { get; set; }
        public string OriginatorNo { get; set; }

        public string OriginatorName { get; set; }

        public string ContactName { get; set; }

        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Email { get; set; }

    }
 
   
    public IActionResult Index()
    {
      
        try
        {

            //int a = 0;
            //int b = 1;
            //int c = b / a;
      

        string strUrl = "https://url";
      

            if (Request.Query\["UserName"\].ToString() != string.Empty && Request.Query\["Password"\] != string.Empty)
            {

              
                HttpContext.Session.SetString("UserName", Request.Query\["UserName"\].ToString());
               
                HttpContext.Session.SetString("Password", Request.Query\["strPassword"\].ToString());
               
            }
            
          


        }
        catch (Exception ex)
        {
            

        }


    }

   
    public class ContactPerson
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Email { get; set; }
        public string IncludeInEmails { get; set; }
    }
  
    public IActionRes

I am working on Webhooks Concept. Since Webhooks act like an trigger. It will be firing an event like Update or Insert takes place. Its a MVC application and I have two Controller Home and Webhook Controller. I am passing argument through Query String on Home controller. I have tried Session,TempData, Cookies for passing variable from home to Webhooks HttpContext.Session.SetString("UserName", Request.Query["UserName"].ToString());

and getting session value on webhook controller

HttpContext.Session.GetString("UserName");

Also tried the same for TempData

Issue is On webbooks Controller its coming null.

I need to store parameter (User Name ,password) and reused the same for database related operation

Kindly guide