aws ec2 describe-principal-id-format
Describes the ID format settings for the root user and all IAM roles and IAM users that have explicitly specified a longer ID (17-character ID) preference. AWS CLI reference
4 options Its page in the AWS CLI reference
Options
--dry-runChecks whether you have the required permissions for the action, without actually making the request, and provides an error response.--max-resultsThe maximum number of results to return in a single call.--next-tokenThe token to request the next page of results.--resourcesThe type of resource: bundle | conversion-task | customer-gateway | dhcp-options | elastic-ip-allocation | elastic-ip-association | export-task | flow-log | image | import-task | instance | internet-gateway | network-acl | network-acl-association | network-interface | network-interface-attachment | prefix-list | reservation | route-table | route-table-association | security-group | snapshot | subnet | subnet-cidr-block-association | volume | vpc | vpc-cidr-block-association | vpc-endpoint | vpc-peering-connection | vpn-connection | vpn-gateway