The endpoint is intentionally limited for security. It’s only usable by the user with the Owner role, so you’d need to connect to the API using user authentication and the owner’s credentials rather than via an Integration’s Admin API key.
If you hit any roadblocks with the API, please always explain your use-case. With that knowledge we can help point you in alternative directions with a better fit, or it can give us information that can help shape the API development.