Database Cluster ID (it's also called PG Cluster ID) is global unique. And you could find it from BigAnimal portal.
Method 1 Get the Database Cluster ID with your Org ID
- Go to the Connect section of your cluster.
- Click 'Copy' button to copy the info either from Host or Service URI
Method 2 Web page link of the database cluster has its ID
https://portal.biganimal.com/clusters/<PG Cluster ID>
For example, the database cluster id in the below screenshoot is p-c64v4p3h5vfavr7tfrpg