Get a list of countries for tax calculation

Example response

{
  "code": 200,
  "result": [
    {
      "code": "Australia",
      "name": "AU",
      "states": [
        {
          "code": "ACT",
          "name": "Australian Capital Territory",
          "shipping_taxable": true
        }
      ],
      "region": "oceania"
    }
  ]
}