List countries

{
  "data": [
    {
      "countryCode": "JM_1",
      "name": "Jamaica",
      "flag": "https://flagcdn.com/48x36/jm.png",
      "serviceCount": 62,
      "startingPrice": {
        "amount": 0.508725,
        "currency": "EUR"
      }
    },
    {
      "countryCode": "US_1",
      "name": "United States (Virtual)",
      "flag": "https://flagcdn.com/48x36/us.png",
      "serviceCount": 1270,
      "startingPrice": {
        "amount": 1.008828,
        "currency": "EUR"
      }
    }
  ],
  "meta": {
    "page": 1,
    "pageSize": 3,
    "total": 170,
    "totalPages": 57,
    "hasNext": true
  }
}

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "The request is not valid. See `fields` for what to correct.",
    "requestId": "9f1c7b2e-…"
  }
}

{
  "error": {
    "code": "AUTHENTICATION_REQUIRED",
    "message": "This endpoint requires an API key.",
    "requestId": "9f1c7b2e-…"
  }
}

{
  "error": {
    "code": "CONFLICT",
    "message": "The resource is not in a state that allows this operation.",
    "requestId": "9f1c7b2e-…"
  }
}

{
  "error": {
    "code": "RATE_LIMITED",
    "message": "Too many requests. Retry after the interval in `Retry-After`.",
    "requestId": "9f1c7b2e-…"
  }
}

{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Something went wrong on our side.",
    "requestId": "9f1c7b2e-…"
  }
}

{
  "error": {
    "code": "SERVICE_RESPONSE_INVALID",
    "message": "The upstream service returned an unexpected response.",
    "requestId": "9f1c7b2e-…"
  }
}

{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "The service is temporarily unavailable. Try again shortly.",
    "requestId": "9f1c7b2e-…"
  }
}