@Override
    @RequestMapping(value = "/api/regAuth")
    public ResponseEntity<String> registration(@RequestBody @Valid User user) throws ExistingUserException {
        User userBase = userService.findByUsername(user.getUsername());
        if(userBase != null)
            throw new ExistingUserException(user.getUsername(), user.getEmail());

        user.setRegisterDate(LocalDateTime.now());
        userService.save(user);

        /*
        Link link = new Link();
        link.setContent(Generator.genRandomString(40));
        link.setCreationDate(LocalDateTime.now());
        link.setExpirationDate(LocalDateTime.now().plusDays(1));
        link.setUser(user.getId());
        link.setDestination("ACTIVATION");
        linkService.add(link);
        */

        return new ResponseEntity<>(HttpStatus.ACCEPTED);
    }