curl --request GET \
  --url http://api.attention.tech/v2/scim/Groups/{id} \
  --header 'Authorization: <api-key>'

{
  "schemas": [
    "urn:ietf:params:scim:schemas:core:2.0:Group",
    "urn:okta:custom:group:1.0"
  ],
  "displayName": "firstGroup",
  "id": "1001",
  "members": [
    {
      "value": "101",
      "display": "okta"
    }
  ],
  "urn:okta:custom:group:1.0": {
    "description": "This is the first group"
  }
}