Using RestTemplate for POST Requests in Spring Boot

@Component
public class RestTemplatePost implements CommandLineRunner {

    @Value("${auth.basic}")
    private String basicAuth;

    @Value("${auth.url}")
    private String authEndpoint;

    @Override
    public void run(String... args) throws Exception {

        // Setting the header
        HttpHeaders headers = new HttpHeaders();
        headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        headers.setBasicAuth(basicAuth);

        // Setting the body
        MultiValueMap<String, String> body = new LinkedMultiValueMap<>();
        body.add("key", "value");

        // Setting the request entity
        HttpEntity<MultiValueMap<String, String>> entity = new HttpEntity<>(body, headers);

        try {
            RestTemplate restTemplate = new RestTemplateBuilder().build();
            ResponseEntity<AuthData> auth = restTemplate.exchange(authEndpoint, HttpMethod.POST, entity, AuthData.class);
            // Handle result
        } catch (Exception e) {
            // Handle error
        }
    }
}