DemoService.java

@Service
public class DemoService {

    private final RestTemplate restTemplate;

    public DemoService(RestTemplateBuilder restTemplateBuilder) {
        this.restTemplate = restTemplateBuilder.build();
    }
    
    public User findUserDetails(String name) {
        return restTemplate.getForObject("https://xxx/{name}/details", User.class, name);
    }
}