onTapSendConfirmationCode method Null safety

Implementation

Future<void> onTapSendConfirmationCode(BuildContext context) async {
  final String username = usernameController.text.trim();
  if (username.isEmpty) {
    EventService().eventBus.fire(PopupEvent(
        type: PopupType.alert,
        action: PopupAction.show,
        data: {"title": "오류", "content": "아이디를 입력하세요."},
        onClose: () {
          Navigator.of(context, rootNavigator: true).popUntil((route) => !route.settings.name!.startsWith(PopupScreen.routeName));
        }));
    return;
  }

  try {
    // SignUpResult result = await Amplify.Auth.confirmSignUp(username: username, confirmationCode: code);
    ResetPasswordResult result = await Amplify.Auth.resetPassword(
      username: username,
    );
    isPasswordReset = result.isPasswordReset;
    EventService().eventBus.fire(PopupEvent(
        type: PopupType.alert,
        action: PopupAction.show,
        data: {"title": "인증코드 발송", "content": "휴대폰으로 발송된 인증코드를 확인해주세요."},
        onClose: () {
          Navigator.of(context, rootNavigator: true).popUntil((route) => !route.settings.name!.startsWith(PopupScreen.routeName));
        }));
  } on AuthException catch (e) {
    EventService().eventBus.fire(PopupEvent(
        type: PopupType.alert,
        action: PopupAction.show,
        data: {"title": "오류", "content": e.message},
        onClose: () {
          Navigator.of(context, rootNavigator: true).popUntil((route) => !route.settings.name!.startsWith(PopupScreen.routeName));
        }));
  }
}