curl --request GET \
  --url https://api.unprice.dev/v1/customer/{customerId}/getEntitlements \
  --header 'Authorization: Bearer <token>'

{
  "entitlements": [
    {
      "featureSlug": "<string>",
      "validFrom": 123,
      "validTo": 123,
      "featureType": "flat",
      "usage": "<string>",
      "limit": 123,
      "featurePlanVersionId": "<string>",
      "aggregationMethod": "sum",
      "units": 123,
      "id": "<string>"
    }
  ]
}