List Tiers

curl -X GET \
  'https://www.wixapis.com/loyalty-tiers/v1/tiers' \
  -H 'Authorization: <AUTH>'

{
  "tiers": [
    {
      "id": "acddc0e0-5e27-4a1b-a52d-b3785ac258cb",
      "tierDefinition": {
        "icon": {
          "id": "",
          "url": "shapes/39dce0a5d1ce498f95526b1390eaf585.svg",
          "height": 0,
          "width": 0
        },
        "name": "Gold",
        "description": "Earn 2x points and get special discount"
      },
      "requiredPoints": 200,
      "revision": "1",
      "createdDate": "2024-02-15T14:22:02.539Z",
      "updatedDate": "2024-04-17T11:34:25.274Z"
    }
  ]
}