> ./aws_check_subnet_groups.sh
Looking in AWS Region: ap-northeast-1
Looking in AWS Region: ap-northeast-2
Looking in AWS Region: ap-northeast-3
Looking in AWS Region: ap-south-1
Looking in AWS Region: ap-southeast-1
Looking in AWS Region: ap-southeast-2
Looking in AWS Region: ca-central-1
Looking in AWS Region: eu-central-1
Found an unused DB Subnet Group: kanis-subnet-group in eu-central-1
Found an unused DB Subnet Group: mkanis-lb-subnet-group in eu-central-1
Found an unused DB Subnet Group: mkanis-subnet-group in eu-central-1
Looking in AWS Region: eu-north-1
Looking in AWS Region: eu-west-1
Looking in AWS Region: eu-west-2
Found an unused DB Subnet Group: default-vpc-0c169e35a2ce3569b in eu-west-2
Found an unused DB Subnet Group: default-vpc-0c7ac4dd7a1352bad in eu-west-2
Looking in AWS Region: eu-west-3
Found an unused DB Subnet Group: default in eu-west-3
Found an unused DB Subnet Group: gh-aurora-db-subnet-group in eu-west-3
Looking in AWS Region: sa-east-1
Looking in AWS Region: us-east-1
Found an unused DB Subnet Group: gh-action-2c397d7-subnet-group in us-east-1
Found an unused DB Subnet Group: gh-action-f44b2c3-subnet-group in us-east-1
Looking in AWS Region: us-east-2
Looking in AWS Region: us-west-1
Looking in AWS Region: us-west-2
fixes #835
Sample output of the script from my local.