curl --request POST \
  --url https://sandbox.api.fantasyfutbol.app/v1/fantasy-league \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "league_id": 123
}
'

{
  "statusCode": 201,
  "message": "Fantasy league created",
  "data": {
    "id": 10,
    "name": "Fnatasy Premier League 1",
    "is_active": true,
    "created_at": "2025-11-16T17:14:39.078Z",
    "updated_at": "2025-11-16T17:14:39.078Z",
    "logo_url": null,
    "created_by": 4,
    "max_entries_per_user": 1
  }
}