/** list all lanes */
  def index = Action { implicit request =>
    Async {
      val cursor = collection.find(
        BSONDocument(), BSONDocument()).cursor[Lane] // get all the fields of all the lanes
      val futureList = cursor.toList // convert it to a list of lane
      futureList.map { lanes => Ok(Json.toJson(lanes)) } // convert it to a JSON and return it
    }
  }