Describes the ID format settings for resources for the specified IAMuser, IAM role, or root user.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/ec2/describe-identity-id-format.html
aws ec2 describe-identity-id-format --principal-arn arn-of-iam-principal --region region |
| Resource IDs - Amazon Elastic Compute Cloud : http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resource-ids.html |
| aws ec2 describe-identity-id-format --principal-arn arn-of-iam-principal |
| Configure AWS EC2 Resource ID Length - Bonus Bits : http://www.bonusbits.com/wiki/HowTo%3AConfigure_AWS_EC2_Resource_ID_Length |