Oturum aç ve ApiCode al

{
  "ApiKey": "3f9c2a7e5b1d4c08",
  "ApiPassword": "Xk82!pQz7mWv",
  "DeveloperId": "ornek-erp-connector"
}

curl -X POST 'https://out.stockmount.com/api/User/DoLogin' \
  -H 'Content-Type: application/json' \
  -d '{
  "ApiKey": "3f9c2a7e5b1d4c08",
  "ApiPassword": "Xk82!pQz7mWv",
  "DeveloperId": "ornek-erp-connector"
}'

using System.Net.Http;
using System.Text;

using var http = new HttpClient();
var json = """
{
  "ApiKey": "3f9c2a7e5b1d4c08",
  "ApiPassword": "Xk82!pQz7mWv",
  "DeveloperId": "ornek-erp-connector"
}
""";

var response = await http.PostAsync(
    "https://out.stockmount.com/api/User/DoLogin",
    new StringContent(json, Encoding.UTF8, "application/json"));

var result = await response.Content.ReadAsStringAsync();
// Result == false ise ErrorCode ve ErrorMessage alanlarına bakın.
Console.WriteLine(result);

<?php
$body = <<<'JSON'
{
  "ApiKey": "3f9c2a7e5b1d4c08",
  "ApiPassword": "Xk82!pQz7mWv",
  "DeveloperId": "ornek-erp-connector"
}
JSON;

$ch = curl_init('https://out.stockmount.com/api/User/DoLogin');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => $body,
    CURLOPT_RETURNTRANSFER => true,
]);
$result = json_decode(curl_exec($ch), true);
curl_close($ch);

if (!$result['Result']) {
    echo $result['ErrorCode'] . ' ' . $result['ErrorMessage'];
}

import requests

payload = {
    "ApiKey": "3f9c2a7e5b1d4c08",
    "ApiPassword": "Xk82!pQz7mWv",
    "DeveloperId": "ornek-erp-connector"
}

response = requests.post("https://out.stockmount.com/api/User/DoLogin", json=payload, timeout=60)
result = response.json()

if not result["Result"]:
    print(result["ErrorCode"], result["ErrorMessage"])

const payload = {
  "ApiKey": "3f9c2a7e5b1d4c08",
  "ApiPassword": "Xk82!pQz7mWv",
  "DeveloperId": "ornek-erp-connector"
};

const response = await fetch("https://out.stockmount.com/api/User/DoLogin", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify(payload),
});
const result = await response.json();

if (!result.Result) {
  console.error(result.ErrorCode, result.ErrorMessage);
}