public IHttpActionResult register(SendOTPModel sms) { if (!ModelState.IsValid) { return(BadRequest(ModelState)); } var error = String.Empty; var message = String.Format("ANN.COM.VN - Ma OTP cua ban la: {0}. Ma se het han trong vong 5 phut. Cam on!", sms.otp); try { var result = _service.bulkSendSms(sms.phone, message, 0, out error); if (!result) { return(BadRequest(error)); } else { return(Ok()); } } catch (Exception ex) { return(BadRequest(ex.Message)); } }