无法检索Smartsheet注释C#

using System;
using System.Net.Http;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;

class Program
{
    static async Task Main(string[] args)
    {
        string accessToken = "YOUR_ACCESS_TOKEN";
        string sheetId = "YOUR_SHEET_ID";

        using (HttpClient client = new HttpClient())
        {
            client.DefaultRequestHeaders.Add("Authorization", $"Bearer {accessToken}");

            string url = $"https://api.smartsheet.com/2.0/sheets/{sheetId}/rows";
            HttpResponseMessage response = await client.GetAsync(url);

            if (response.IsSuccessStatusCode)
            {
                string content = await response.Content.ReadAsStringAsync();
                JObject json = JObject.Parse(content);

                // 处理注释
                foreach (var row in json["rows"])
                {
                    foreach (var cell in row["cells"])
                    {
                        if (cell["comments"] != null)
                        {
                            Console.WriteLine($"Cell: {cell["columnId"]}, Comments: {cell["comments"]}");
                        }
                    }
                }
            }
            else
            {
                Console.WriteLine($"Error: {response.StatusCode}");
            }
        }
    }
}