When I post a request to signup, while my mysql database hasn’t been started, I get an exception thrown in my Spring boot application, but I still get a OK response from postman.

How can I make it so an OK response isn’t given if there is an error thrown in my application.

This is request from Postman:

{
    "username": "user",
    "password": "123",
    "email" : "example",
    "biography": "example bio",
    "profileImageUrl": "profile.image"
}

This is my controller code:

    @PostMapping("/signup")
    public ResponseEntity<Object> signup(@RequestBody RegisterRequest registerRequest) {
        this.authService.signup(registerRequest);
        return ResponseEntity.ok().build();
    }

And this is the authService.signup() method:

    @Async
    public void signup(RegisterRequest registerRequest) {
        if (!userRepository.existsByUsername(registerRequest.getUsername())) {
            User user = new User();
            user.setUsername(registerRequest.getUsername());
            user.setPassword(passwordEncoder.encode(registerRequest.getPassword()));
            user.setEmail(registerRequest.getEmail());
            user.setBiography(registerRequest.getBiography());
            user.setProfileImageUrl(registerRequest.getProfileImageUrl());
            user.setCreationDate(Instant.now());
            user.setEnabled(false);

            VerificationToken token = generateToken(user);
            log.info("Token: " + token.getToken());
            this.emailService.sendVerificationMessage(user.getEmail(), token.getToken());
        } else {
            throw new UserExistsException("User with username " + registerRequest.getUsername() + " already exists");
        }
    }