curl -X POST http://localhost/fss/public/api/v1/countries/index \
  -H "Content-Type: application/json" \
  -d '{}'

const response = await fetch('http://localhost/fss/public/api/v1/countries/index', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({})
});

const data = await response.json();

{
  "status": "success",
  "data": [
    {
      "id": 1,
      "name": "United States",
      "code": "US"
    },
    {
      "id": 2,
      "name": "Canada",
      "code": "CA"
    }
  ]
}

{
  "status": "error",
  "message": "Failed to fetch countries"
}