In AWS I can use CloudTrail to monitor API calls that may impact IAM groups and roles.
In Google App Engine, is there any similar offering like CloudTrail? In Google Cloud Platform, as far as I can see, the 'IAM & Admin' panel only allows management and display of basic info IAM user and service accounts. The slack driver also does not seem to offer audit trail (The feature is currently in private beta and is not recommended for production use: https://cloud.google.com/monitoring/access-control).
Any suggestion is welcome.