curl --request GET \
  --url https://api.satsuma.ai/merchant/{merchantId}/category \
  --header 'Authorization: <api-key>'

{
  "data": [
    {
      "id": "<string>",
      "merchant_id": "<string>",
      "external_id": "<string>",
      "name": "<string>",
      "parent_id": "<string>",
      "parent_external_id": "<string>",
      "level": "Department",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "depth": 123
    }
  ],
  "messages": [
    {
      "context": "<string>",
      "level": "Information",
      "text": "<string>",
      "data": {}
    }
  ],
  "total": 123
}