Create Assistant Integration

{
  "id": "<string>",
  "enabled": true,
  "integration_id": "internal",
  "assistant_id": "<string>",
  "connection_id": "<string>",
  "config": {},
  "error": "<string>",
  "created_at": "2023-12-25",
  "updated_at": "2023-12-25"
}