Auto Fill otp using sms_auto_fill flutter package

otp.md

1. Add the dependency https://pub.dev/packages/sms_autofill
2. your class must implement the mixi CodeAutoFill mixin
3. in initstate you should generate the app Signature and listen for the code

@override
  void initState() {
    listenForCode();
      SmsAutoFill().getAppSignature.then((signature) {
      setState(() {
        appSignature = signature;
        print(appSignature);
      });
    });
    super.initState();
}

4. In the overriden method

 @override
  void codeUpdated() {
    // TODO: implement codeUpdated
    setState(() {
      otpController.text = code;
    });
    verifyOtp(code);
  }

  @override
  void dispose() {
    cancel();
    if (_shouldDisposeController) {
      controller.dispose();
    }
    unregisterListener();
    super.dispose();
  }

ANd the bakend should send tge otp in this format

<#> ExampleApp: Your code is 123456
FA+9qCX9VSu

where FA+.. is the appSignature generated in step 3