help with c#

using UnityEngine;
using UnityEngine.UI;
using System.Collections.Generic;
using System.Text;
using System.Net.Http;
using System;
using System.Threading.Tasks;

namespace UltrakillProject3
{
    public class DiscordWebhook : MonoBehaviour
    {
        public Button button; //buttoncomp ref
        public string webhookUrl = ""; // url

        void Start()
        {
            // buton?
            if (button == null)
            {
                Debug.LogError("Button not assigned!");
                return;
            }

            // listen onclikc
            button.onClick.AddListener(SendMessageToDiscord);
        }

        async void SendMessageToDiscord()
        {
            await PostToDiscord();
        }

        async Task PostToDiscord()
        {
            // make sure webhk is there
            if (string.IsNullOrEmpty(webhookUrl))
            {
                Debug.LogError("Webhook URL is not set!");
                return;
            }

            // json payload
            var jsonContent = new Dictionary<string, string>
            {
                { "content", "Button pressed!" }
            };
            var jsonPayload = JsonUtility.ToJson(jsonContent);
            Debug.Log($"Sending JSON payload to Discord: {jsonPayload}");

            var payload = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

            // http post request
            using (var client = new HttpClient())
            {
                try
                {
                    var response = await client.PostAsync(webhookUrl, payload);
                    var responseContent = await response.Content.ReadAsStringAsync();
                    if (response.IsSuccessStatusCode)
                    {
                        Debug.Log("Message sent to Discord!");
                    }
                    else
                    {
                        Debug.LogError($"Failed to send message to Discord. Status Code: {response.StatusCode}, Reason: {response.ReasonPhrase}, Content: {responseContent}");
                    }
                }
                catch (Exception e)
                {
                    Debug.LogError($"Error sending message to Discord: {e.Message}");
                }
            }
        }
    }
}

using UnityEngine;
using UnityEngine.UI;
using System.Collections.Generic;
using System.Text;
using System.Net.Http;
using System;
using System.Threading.Tasks;

namespace UltrakillProject3
{
    public class DiscordWebhook : MonoBehaviour
    {
        public Button button; //buttoncomp ref
        public string webhookUrl = ""; // url

        void Start()
        {
            // buton?
            if (button == null)
            {
                Debug.LogError("Button not assigned!");
                return;
            }

            // listen onclikc
            button.onClick.AddListener(SendMessageToDiscord);
        }

        async void SendMessageToDiscord()
        {
            await PostToDiscord();
        }

        async Task PostToDiscord()
        {
            // make sure webhk is there
            if (string.IsNullOrEmpty(webhookUrl))
            {
                Debug.LogError("Webhook URL is not set!");
                return;
            }

            // json payload
            var jsonContent = new Dictionary<string, string>
            {
                { "content", "Button pressed!" }
            };
            var jsonPayload = JsonUtility.ToJson(jsonContent);
            Debug.Log($"Sending JSON payload to Discord: {jsonPayload}");

            var payload = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

            // http post request
            using (var client = new HttpClient())
            {
                try
                {
                    var response = await client.PostAsync(webhookUrl, payload);
                    var responseContent = await response.Content.ReadAsStringAsync();
                    if (response.IsSuccessStatusCode)
                    {
                        Debug.Log("Message sent to Discord!");
                    }
                    else
                    {
                        Debug.LogError($"Failed to send message to Discord. Status Code: {response.StatusCode}, Reason: {response.ReasonPhrase}, Content: {responseContent}");
                    }
                }
                catch (Exception e)
                {
                    Debug.LogError($"Error sending message to Discord: {e.Message}");
                }
            }
        }
    }
}