child: ElevatedButton(
                  onPressed: () {
                    if (_formKey.currentState!.validate()) {
                      _formKey.currentState!.save();


                      CertificationData data = CertificationData(
                        pg: pg,
                        merchantUid: merchantUid,
                        carrier: carrier,
                        company: company,
                        name: name,
                        phone: phone,
                      );
                      print("m_redirect_url: ${data.mRedirectUrl}");
                      if (minAge.length > 0) {
                        data.minAge = int.parse(minAge);
                      }


                      Get.toNamed('/certification', arguments: data);
                    }
                  },

    return IamportCertification(
      appBar: AppBar(
        title: Text('아임포트 본인인증'),
        centerTitle: true,
        leading: IconButton(
          icon: Icon(Icons.arrow_back_ios),
          onPressed: () {
            Get.back();
          },
        ),
      ),
      initialChild: SafeArea(
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Image.asset('assets/images/iamport-logo.png'),
              Padding(padding: EdgeInsets.symmetric(vertical: 15)),
              Text('잠시만 기다려주세요...', style: TextStyle(fontSize: 20.0)),
            ],
          ),
        ),
      ),
      userCode: userCode,
      data: data,
      callback: (Map<String, String> result) {
        Get.offNamed('/certification-result', arguments: result);
      },
    );
  }

  return IamportWebView(
        type: ActionType.auth,
        appBar: this.appBar,
        initialChild: this.initialChild,
        gestureRecognizers: this.gestureRecognizers,
        customUserAgent: this.customUserAgent,
        executeJS: (WebViewController controller) {
          controller.evaluateJavascript('''
            IMP.init("${this.userCode}");
            IMP.certification(${jsonEncode(this.data.toJson())}, function(response) {
              const query = [];
              Object.keys(response).forEach(function(key) {
                query.push(key + "=" + response[key]);
              });
              location.href = "$redirectUrl" + "?" + query.join("&");
            });
          ''');
        },
        useQueryData: (Map<String, String> data) {
          this.callback(data);
        },
        isPaymentOver: (String url) {
          return url.startsWith(redirectUrl);
        },
        // 인증에는 customPGAction 수행할 필요 없음
        customPGAction: (WebViewController controller) {},
      );

   data: CertificationData(
        merchantUid: 'mid_${DateTime.now().millisecondsSinceEpoch}',  // 주문번호
        company: '아임포트',                                            // 회사명 또는 URL
        carrier: 'SKT',                                               // 통신사
        name: '홍길동',                                                 // 이름
        phone: '01012341234',  // 전화번호
        mRedirectUrl: UrlData.redirectUrl
      ),