グループの現在のCAを取得します。 詳細は次のリンクを参照してください。 https://docs.aws.amazon.com/ja_jp/cli/latest/reference/greengrass/list-group-certificate-authorities.html
| aws greengrass list-group-certificate-authorities \ |
| ListGroupCertificateAuthorities - AWS Greengrass : http://docs.aws.amazon.com/greengrass/latest/apireference/-greengrass-groups-groupid-certificateauthorities.html |
| aws greengrass list-group-certificate-authorities --group-id 92c8ebae-6bf2-4149-8f9a-5709194d4920 |
| 20180508 AWS Black Belt Online Seminar AWS Greengrassで実現するエッジコンピューティング : http://www.slideshare.net/AmazonWebServicesJapan/20180508-aws-black-belt-online-seminar-aws-greengrass |