Ensure that there are no IAM Users with Pub/Sub Administrator role at the project level.
The pre-defined role “Pub/Sub Admin” grants full access over Pub/Sub topics, subscriptions, and snapshots. As a best practice, avoid granting access to Pub/Sub Admin roles at the project level; instead, grant specific Pub/Sub permissions to IAM members.
Ensure that no IAM member has the pre-defined Pub/Sub Administrator role.