I am trying to add a new record via http post method as given below.

The problem is that in respose I get a login page html.

2.   protected void btnSubmit_OnClick(object sender, EventArgs e)
3.             {
4. 
   
5.                 var response = Http.Post("https://creator.zoho.com/<USERNAME>/<APPLICATION_NAME>/form-perma/NEWCONTACT/record/add/", new NameValueCollection() {
6.                 { "authtoken", "<KEY>" },
7.                 { "scope", "creatorapi" },
8.                 { "First_Name", "John" },
9.                 { "Last_Name", "Doe" },
10.                 { "Email", "someone22@gmail.com" },
11.                 { "Company_Name", "Orca Studios" },
12.                 { "Company_Phone", "9949499666" },
13.                 { "Job_Title", "Dev" },
14.                 { "Company_Country", "Australia" },
15.                 { "Catalog_Size", "less than 50 titles" },
16.                 { "Catalog_Genre_s", "ALL" },
17.                 { "Company_Type", "Archive" },
18.                 { "Lead_Source", "Website" },
19.                 });
20.                 string result = System.Text.Encoding.UTF8.GetString(response);
21.               
22.             }
23. 
    
25.  public static class Http
26.         {
27.             public static byte[] Post(string uri, NameValueCollection pairs)
28.             {
29.             byte[] response = null;
30.             using (WebClient client = new WebClient())
31.             {
32.             response = client.UploadValues(uri, pairs);
33.             }
34.             return response;
35.             }
36.         }

I am using asp.net with c#.

Please tell me what I am doing wrong.

Warm Regards