FreeStorageSpace not a metric on my database

[kevcube]

Describe the Bug

In my CloudWatch metrics, I see FreeLocalStorage but not FreeStorageSpace. (Using Postgres Aurora 12)

Not sure if AWS has renamed their metrics, or if postgres is treated differently than other Aurora/RDS DBs.

Expected Behavior

The storage alarm is in "not enough data" state

Steps to Reproduce

Steps to reproduce the behavior:

1. Postgres RDS Aurora
2. Apply this module
3. Alarm will be in "not enough data"

Screenshots

Environment (please complete the following information):

Postgres RDS Aurora

Additional Context

Add any other context about the problem here.