public List<UserDto> getAllUsers() {
   return securityController.findByFilter(
       wild(filter.getUsername()),
       wild(filter.getEmail()),
       wild(filter.getFirstname()),
       wild(filter.getSurename()),
       filter.getRole());
 }
 public String addUser() {
   securityController.registerUser(selectedUser);
   return "/views/secure/users";
 }