public String initiatePayment(@RequestParam(SMS_ID) String smsID,
            @RequestParam(value = SMS_BODY, required = false) String body,
            @RequestParam(SITE_SERVICE_ID) String siteServiceId,
            @RequestParam(value = OPERATOR_ID, required = false) String operatorId,
            @RequestParam(value = NUM, required = false) String shortPhoneNumber,
            @RequestParam(value = SMS_PRICE, required = false) String price,
            @RequestParam(value = SECRET_KEY, required = false) String signature,
            @RequestParam(value = STATUS, required = false) Integer status,
            @RequestParam(value = USER_NUM, required = false) String userNum,
            HttpServletResponse resp
            ) throws IOException {