// Verify an OTANTIK code
const res = await fetch('https://api.otantik.granlaku.com/v1/verify', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${apiKey}`,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    user_id: 'user_8231',
    code: '452917'
  })
});

const data = await res.json();
// { "verified": true, "expires_in": 27 }