Interceptors typesafe'ly combined

security.scala

val securedByUserName = Intercept(
    r => Cache.getAs[String]("username").toSuccess(NonEmptyList("No username")), 
    (err, v:Failure[NonEmptyList[String], String]) => Unauthorized(v.e.list.mkString("\n"))
)
val securedByUserId = Intercept(
    r => Cache.getAs[String]("userid").map(_.toInt).toSuccess(NonEmptyList("No userid")), 
    (err, v:Failure[NonEmptyList[String], Int]) => Unauthorized(v.e.list.mkString("\n"))
)


def securedAction = (securedByUserName ~::~ securedByUserId).apply { case (username:String) :: (userId:Int) :: HNil =>
    Action {
        /*Yeepee : get some stuff in the database using the id*/
        Ok("Welcome Nb. " + userId + "\naka : " + username + "")
    }
}