curl --request GET \
  --url https://app.flowglad.com/api/v1/product-features/{id} \
  --header 'Authorization: <api-key>'

{
  "productFeature": {
    "id": "<string>",
    "createdAt": 0,
    "updatedAt": 0,
    "livemode": true,
    "productId": "<string>",
    "featureId": "<string>",
    "organizationId": "<string>",
    "expiredAt": 0
  }
}