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

{
  "feature": {
    "id": "<string>",
    "createdAt": 0,
    "updatedAt": 0,
    "livemode": true,
    "organizationId": "<string>",
    "type": "<string>",
    "slug": "<string>",
    "name": "<string>",
    "description": "<string>",
    "amount": null,
    "usageMeterId": null,
    "renewalFrequency": null,
    "pricingModelId": "<string>",
    "active": true
  }
}