curl --request POST \
  --url "https://siteadresiniz.example/Files/Controllers/ControllersAll.php?main=CreditsManage&container=CreditsAddController" \
  --header "X-API-Key: $ZONELY_API_KEY" \
  --form 'credit=@DOSYA_YOLU'

const form = new FormData();
form.append('credit', '<string>');

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

options.body = form;

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