curl --request GET \
  --url https://api.ivory.finance/v1/topics \
  --header 'X-API-Key: <api-key>'

{
  "total": 123,
  "groups": [
    {
      "category": "<string>",
      "topics": [
        {
          "id": 123,
          "name": "<string>",
          "slug": "<string>",
          "category": "<string>",
          "description": "<string>",
          "keywords": [
            "<string>"
          ]
        }
      ]
    }
  ]
}