GET(with auth headers) customer with RestTemplate

          RestTemplate restTemplate = new RestTemplate();
          String customerAPIUrl = "http://localhost:9080/api/customer";
          HttpHeaders headers = new HttpHeaders();

          headers.set("Authorization", "Bearer " + accessToken); //accessToken can be the secret key you generate.
          headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
          String requestJson = "{\"email\":\"[email protected]\"}";
          HttpEntity <String> entity = new HttpEntity <> (requestJson, headers);
          ResponseEntity <String> response = restTemplate.exchange(customerAPIUrl, HttpMethod.GET, entity, String.class);