gcloud iam service-accounts keys list

gcloud iam service-accounts keys list
ERROR: (gcloud.iam.service-accounts.keys.list) argument --iam-account: Must be specified.
Usage: gcloud iam service-accounts keys list --iam-account=IAM_ACCOUNT [optional flags]
  optional flags may be  --created-before | --filter | --help | --limit |
                         --managed-by | --page-size | --sort-by 

For detailed information on this command and its flags, run:
 gcloud iam service-accounts keys list --help

See also

• Service accounts: gcloud iam service-accounts [ create | get-iam-policy | list | delete | describe | keys ], gcloud auth activate-service-account
• gcloud iam [ roles | service-accounts | get-iam-policy | roles describe ], gcloud asset search-all-iam-policies, list-grantable-roles