curl --request GET \
  --url https://core.ravenna.ai/api/user-groups \
  --header 'x-ravenna-api-token: <api-key>'

{
  "items": [
    {
      "id": "<string>",
      "name": "<string>",
      "description": "<string>",
      "emoji": "<string>",
      "icon": "<string>",
      "color": "<string>",
      "imageUrl": "<string>",
      "organizationId": "<string>",
      "integrationGroupId": "<string>",
      "_count": {
        "users": 123
      },
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "integrationSource": "CODA",
      "isImmutable": true
    }
  ],
  "nextCursor": "<string>",
  "totalCount": 123
}