public String payUUrl(Order order) throws JsonProcessingException {
        RestTemplate client = new RestTemplate();
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        headers.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));
        headers.setBearerAuth(getAccessToken());
        ObjectMapper mapper = new ObjectMapper();
        String json = mapper.writeValueAsString(order);
        HttpEntity<?> entity = new HttpEntity<>(json,headers);
        String orderUrl = "https://secure.snd.payu.com/api/v2_1/orders/";
        ResponseEntity<String> response1 = client.exchange(orderUrl,HttpMethod.POST,entity,String.class);
        JsonNode root1 = mapper.readTree(response1.getBody());

        return root1.get("redirectUri").asText();

    }