curl --request POST \
  --url "https://siteadresiniz.example/Files/Controllers/ControllersAll.php?main=Currencies&container=CurrenciesEditController" \
  --header "X-API-Key: $ZONELY_API_KEY" \
  --form 'id=ALAN_DEGERI' \
  --form 'code=ALAN_DEGERI' \
  --form 'label=ALAN_DEGERI' \
  --form 'symbol=ALAN_DEGERI' \
  --form 'rate=ALAN_DEGERI' \
  --form 'prefix=ALAN_DEGERI' \
  --form 'suffix=ALAN_DEGERI' \
  --form 'auto_update=ALAN_DEGERI'

const form = new FormData();
form.append('id', '<string>');
form.append('code', '<string>');
form.append('label', '<string>');
form.append('symbol', '<string>');
form.append('rate', '<string>');
form.append('prefix', '<string>');
form.append('suffix', '<string>');
form.append('auto_update', '<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));