Retrieve leads using weebhooks

Question

in the code below idk were my leads are stored ?

using System;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using System.Web;
using System.Web.Http;
using FacebookLeadAdsWebhooks.Model;
using Newtonsoft.Json;
namespace FacebookLeadAdsWebhooks.Controller
{
public class WebhooksController : ApiController
{
#region Get Request
[HttpGet]
public HttpResponseMessage Get()
{
var response = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(HttpContext.Current.Request.QueryString["hub.challenge"])
};
response.Content.Headers.ContentType = new MediaTypeHeaderValue("text/plain");
return response;
}
#endregion Get Request
#region Post Request
[HttpPost]
public async Task<HttpResponseMessage> Post([FromBody] JsonData data)
{
try
{
var entry = data.Entry.FirstOrDefault();
var change = entry?.Changes.FirstOrDefault();
if (change == null) return new HttpResponseMessage(HttpStatusCode.BadRequest);
//Generate user access token here https://developers.facebook.com/tools/accesstoken/
const string token = "<USER TOKEN>";
var leadUrl = $"https://graph.facebook.com/v2.10/{change.Value.LeadGenId}?access_token={token}";
var formUrl = $"https://graph.facebook.com/v2.10/{change.Value.FormId}?access_token={token}";
using (var httpClientLead = new HttpClient())
{
var response = await httpClientLead.GetStringAsync(formUrl);
if (!string.IsNullOrEmpty(response))
{
var jsonObjLead = JsonConvert.DeserializeObject<LeadFormData>(response);
//jsonObjLead.Name contains the lead ad name
//If response is valid get the field data
using (var httpClientFields = new HttpClient())
{
var responseFields = await httpClientFields.GetStringAsync(leadUrl);
if (!string.IsNullOrEmpty(responseFields))
{
var jsonObjFields = JsonConvert.DeserializeObject<LeadData>(responseFields);
//jsonObjFields.FieldData contains the field value
}
}
}
}
return new HttpResponseMessage(HttpStatusCode.OK);
}
catch (Exception ex)
{
Trace.WriteLine($"Error-->{ex.Message}");
Trace.WriteLine($"StackTrace-->{ex.StackTrace}");
return new HttpResponseMessage(HttpStatusCode.BadGateway);
}
}
#endregion Post Request
}
}