Код-ревью: контроллер пользователей

@RestController
@RequestMapping("/api/users")
public class UserController {
    @Autowired
    private UserRepository repo;

    @GetMapping("/{id}")
    public User get(@PathVariable Long id) {
        return repo.findById(id).get();
    }

    @PostMapping
    public User create(@RequestBody User user) {
        return repo.save(user);
    }

    @GetMapping
    public List<User> all() {
        return repo.findAll();
    }

    @GetMapping("/{id}/avatar")
    public byte[] avatar(@PathVariable Long id) {
        try {
            return repo.findById(id).get().getAvatar();
        } catch (Exception e) {
            return null;
        }
    }
}