curl --request GET \
  --url https://sandbox.api.fin.com/v1/countries \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "pagination": {
      "current_page": 1,
      "per_page": 10,
      "total_page": 25,
      "total": 246
    },
    "countries": [
      {
        "code": "AFG",
        "name": "Afghanistan",
        "currency_code": "AFN",
        "phone_code": "+93",
        "flag_url": "https://flagcdn.com/af.svg"
      }
    ]
  }
}