To create a Greeengrass group

The following create-group example creates a group named cli-created-group.

aws greengrass create-group \
    cli-created-group

Output:

{
    "Arn": "arn:aws:greengrass:us-west-2:123456789012:/greengrass/groups/4e22bd92-898c-436b-ade5-434d883ff749",
    "CreationTimestamp": "2019-06-25T18:07:17.688Z",
    "Id": "4e22bd92-898c-436b-ade5-434d883ff749",
    "LastUpdatedTimestamp": "2019-06-25T18:07:17.688Z",
    "Name": "cli-created-group"
}