I'm doing a POST to https://iap.googleapis.com/v1/projects/MY_PROJECT_ID/iap_web:getIamPolicy
with an empty body as the documentation specifies.
The API response is an HTTP 200 with the body simply being {"etag": "ACAB"}
What does this mean? What should I be doing differently to retrieve the actual policy data?
IAP and the IAP API are both enabled for this project.