Is this a good way for producing a json respons of users with their cars?

gistfile1.scala

implicit val carWriter = Json.writes[Car]
implicit val userWithCarWriter = Json.writes[UserWithCar]
  
def users = Action {
  val users = DB.withSession { implicit session =>
    val q = for {
      u <- Users
      c <- Cars if u.carId === c.id
    } yield (u, c)
    q.list.map { row =>
      UserWithCar(row._1.id, row._1.email, row._1.name, Car(row._2.id, row._2.name))
    }
  }
  Ok(Json.toJson(users))
}