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1@RestController2@RequestMapping("/api/users")3@RequiredArgsConstructor4public class UserController {56    private final UserService userService;78    @GetMapping("/{id}")9    public ResponseEntity<UserDto> getUser(@PathVariable Long id) {10        return userService.findById(id)11                .map(UserDto::from)12                .map(ResponseEntity::ok)13                .orElse(ResponseEntity.notFound().build());14    }1516    @PostMapping17    @ResponseStatus(HttpStatus.CREATED)18    public UserDto createUser(@Valid @RequestBody CreateUserRequest req) {19        return UserDto.from(userService.create(req));20    }21}