Adds an attribute and values to, or removes an attribute and valuesfrom, a manual DB cluster snapshot.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/rds/modify-db-cluster-snapshot-attribute.html
| aws rds modify-db-cluster-snapshot-attribute \ |
| Sharing a DB Cluster Snapshot - Amazon Aurora : http://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/USER_ShareSnapshot.html |