Get cart

Example response

{
  "data": {
    "subtotal": 4400,
    "items": [
      {
        "id": "itm_XXXXXXXXXXXXXXXXXXXXXXXXX",
        "productVariantID": "var_XXXXXXXXXXXXXXXXXXXXXXXXX",
        "quantity": 2,
        "subtotal": 4400
      }
    ],
    "amount": {
      "subtotal": 4400,
      "shipping": 800
    },
    "addressID": "shp_XXXXXXXXXXXXXXXXXXXXXXXXX",
    "cardID": "crd_XXXXXXXXXXXXXXXXXXXXXXXXX",
    "shipping": {
      "service": "USPS Ground Advantage",
      "timeframe": "3-5 days"
    }
  }
}