curl --request POST \
  --url "https://siteadresiniz.example/Files/Controllers/ControllersAll.php?main=Licenses&container=LicensesAddController" \
  --header "X-API-Key: $ZONELY_API_KEY" \
  --form 'user=ALAN_DEGERI' \
  --form 'order_status=ALAN_DEGERI' \
  --form 'order_total=ALAN_DEGERI' \
  --form 'items[0][product_id]=ALAN_DEGERI' \
  --form 'items[0][quantity]=ALAN_DEGERI' \
  --form 'items[0][unit_price]=ALAN_DEGERI'

const form = new FormData();
form.append('user', '23');
form.append('order_status', 'success');
form.append('order_total', '49.90');
form.append('items[0][product_id]', '15');
form.append('items[0][quantity]', '1');
form.append('items[0][unit_price]', '49.90');
form.append('insertLicenses', 'OTURUM_FORMUNUN_CSRF_DEGERI');

const options = {method: 'POST', headers: {'X-API-Key': '<api-key>'}};

options.body = form;

fetch('https://example.com/Files/Controllers/ControllersAll.php', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{}