Play Slick question

gistfile1.scala

import play.api.db.slick.DB

def allSamplesJson = Action { implicit request =>
  request.session.get("l").map {
    case "i" => DB.withSession { implicit dbs =>
      val all = models.CodeSampleTable.allSamples()
      Ok(Json.toJson(all))
    }
    case _ => Unauthorized(unautStr)
  }.getOrElse {
    Unauthorized(unautStr)
  }
}