@Post
 @Path("/login/")
 @Consumes("application/json")
 public void login(Usuario usuario) {
   boolean authenticated = false;
   String message = "";
   Usuario u =
       repository.getByUsernameAndPassword(
           usuario.getUsername(), Hasher.get(usuario.getPassword()));
   if (u != null) {
     login.setUsuario(u);
     authenticated = true;
     message = "AUTHENTICATED";
   } else {
     authenticated = false;
     message = "NOT_AUTHENTICATED";
   }
   serializer(new SecurityResponse(authenticated, message)).serialize();
 }
 @Get
 @Path("/logout/")
 public void logout() {
   login.setUsuario(null);
   serializer(new SecurityResponse(false, "NOT_AUTHENTICATED")).serialize();
 }