curl --request GET \
  --url http://localhost:3000/v1/bill/categories \
  --header 'Authorization: Bearer <token>'

{
  "status": "success",
  "message": "message for success",
  "data": [
    {
      "id": "airtime",
      "name": "Airtime",
      "currency": "NGN",
      "min_amount": "100",
      "max_amount": "50000"
    }
  ]
}