const params = new URLSearchParams();
const data = new FormData();
data.append('access_token', 'demo_token_abc123');
data.append('account_id', 'acc_demo_001');
data.append('url', 'https://example.com/bigfile.zip');
const resp = await fetch('https://rediafile.com/cloud/api/v2/file/url_upload_add', {
method: 'POST',
body: data
});
const json = await resp.json();
console.log(json);