Return a list of consumers that belong to the specified consumer group.

curl --request GET \
  --url https://api.example.com/admin/v1/consumer-groups/{consumer_group_id}/consumers

{
  "data": [
    {
      "consumer_group_id": "<string>",
      "consumer_id": "<string>",
      "client_id": "<string>",
      "host": "<string>",
      "metadata": {},
      "kind": "<string>"
    }
  ],
  "metadata": {},
  "kind": "<string>"
}