My site KYC api need document_types parameter

using System;
using System.Collections.Specialized;
using System.Net;
using Newtonsoft.Json.Linq;


class KYCApiExample
{
    static void Main()
    {
        using (var client = new WebClient())
        {
            // Define the API endpoint URL
            string apiUrl = "https://api.shuftipro.com";


            // Define your API credentials
            string clientId = "your_client_id_here";
            string secretKey = "your_secret_key_here";


            var postData = new NameValueCollection();
            postData["client_id"] = clientId;
            postData["reference"] = Guid.NewGuid().ToString();
            postData["email"] = "user@example.com";  // Replace with the user's email
            postData["phone_number"] = "1234567890"; // Replace with the user's phone number
            postData["country"] = "US";  // Replace with the user's country
            postData["lang"] = "EN";
            postData["callback_url"] = "https://your-callback-url.com";  // Replace with your callback URL
            postData["redirect_url"] = "https://your-redirect-url.com";  // Replace with your redirect URL


            var servicesData = new
            {
                document_type = "id_card", // Replace with the actual document type
                document_id_no = "12345", // Replace with the document ID
                document_expiry_date = "2023-12-31", // Replace with the document's expiry date
                address = "123 Main St, City, Country", // Replace with the address
                first_name = "John", // Replace with the first name
                last_name = "Doe", // Replace with the last name
                dob = "1990-01-01", // Replace with the date of birth
                background_checks = "0",
            };


            var jsonServicesData = Newtonsoft.Json.JsonConvert.SerializeObject(servicesData);


            postData["verification_services"] = jsonServicesData;


            string rawData = "";
            // Sort the request data keys for calculating the signature
            foreach (var item in postData.AllKeys.OrderBy(k => k))
            {
                rawData += postData[item];
            }


            // Append the secret key to the rawData
            rawData = rawData + secretKey;


            // Calculate the SHA-256 hash for the signature value
            string hash = GetHashSha256(rawData);


            postData["signature"] = hash;


            try
            {
                // Send the POST request to the API
                var response = client.UploadValues(apiUrl, postData);
                var responseString = System.Text.Encoding.Default.GetString(response);


                // Print the response
                Console.WriteLine("API Response: " + responseString);


                // If you want to parse the JSON response, uncomment the following lines
                dynamic stuff = JObject.Parse(responseString);
                string verificationURL = stuff.message;
                Console.WriteLine("Verification URL: " + verificationURL);
            }
            catch (WebException ex)
            {
                // Handle any exceptions, such as network errors
                Console.WriteLine("Error: " + ex.Message);
            }
        }
    }


    static string GetHashSha256(string text)
    {
        using (System.Security.Cryptography.SHA256 sha256 = System.Security.Cryptography.SHA256.Create())
        {
            byte[] hashBytes = sha256.ComputeHash(System.Text.Encoding.UTF8.GetBytes(text));
            return BitConverter.ToString(hashBytes).Replace("-", string.Empty);
        }
    }
}

hope this will help you.