@Override
    public String GetPwdUser(String login)
    {
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("JEE_Application-ejbPU");
        EntityManager em = emf.createEntityManager();
        em.getTransaction().begin();
        User = new Users();
        User.setId(login);
        System.out.println("login");
        System.out.println(User.getId());

        /******
        Users element = (Users) em.createQuery("SELECT a FROM Users a WHERE a.id='Jerome'").getSingleResult();
        System.out.println(element.getId() + " " + element.getPwd()); // Marche pas
        * ***/

        List<Users> element = (List<Users>) em.createQuery("SELECT a FROM Users a").getResultList();
        System.out.println(element.size());
        System.out.println(element.get(0)); // Marche ( toString() )
        System.out.println(element.get(0).getId()); // Marche pas -_-


        //User = (Users) element.get(0);
        //System.out.println(element.get(1).getId()); // Marche pas!


         return "coucou";
    }