@EventHandler
 public void VehicleDestroy(final VehicleDestroyEvent event) {
   if (!(event.getAttacker() instanceof Player)) return;
   final Player player = (Player) event.getAttacker();
   if (plugin.isLoggedIn(player)) return;
   event.setCancelled(true);
   plugin.sendAuthReminderMessage(player);
 }
 @EventHandler
 public void VehicleEnter(final VehicleEnterEvent event) {
   if (!(event.getVehicle().getPassenger() instanceof Player)) return;
   final Player player = (Player) event.getVehicle().getPassenger();
   if (plugin.isLoggedIn(player)) return;
   event.setCancelled(true);
   plugin.sendAuthReminderMessage(player);
 }