TwilioPhoneVerify _twilioPhoneVerify; 

_twilioPhoneVerify = new TwilioPhoneVerify(
        accountSid: '*************************', // replace with Account SID
        authToken: 'xxxxxxxxxxxxxxxxxx',  // replace with Auth Token
        serviceSid: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' // replace with Service SID
        );

 var twilioResponse =
        await _twilioPhoneVerify.sendSmsCode('phone');

    if (twilioResponse.successful)  {
      //code sent
    } else {
      //print(twilioResponse.errorMessage);
    }

    var twilioResponse = await _twilioPhoneVerify.verifySmsCode(
        phone: 'phone', code: 'code');

    if (twilioResponse.successful) {
      if (twilioResponse.verification.status == VerificationStatus.approved) {
        //print('Phone number is approved');
      } else {
        //print('Invalid code');
      }
    } else {
      //print(twilioResponse.errorMessage);
    }

 var twilioResponse =
        await _twilioPhoneVerify.sendEmailCode('email');

    if (twilioResponse.successful)  {
      //code sent
    } else {
      //print(twilioResponse.errorMessage);
    }

    var twilioResponse = await _twilioPhoneVerify.verifyEmailCode(
        email: 'email', code: 'code');

    if (twilioResponse.successful) {
      if (twilioResponse.verification.status == VerificationStatus.approved) {
        //print('Email is approved');
      } else {
        //print('Invalid code');
      }
    } else {
      //print(twilioResponse.errorMessage);
    }

 var twilioResponse =
        await _twilioPhoneVerify.sendEmailCode('email',channelConfiguration:
    EmailChannelConfiguration(
        from: "[email protected]",
        from_name: "Override Name",
        template_id: "d-4f7abxxxxxxxxxxxx",
		usernameSubstitution: "Foo Bar"
    ));

    if (twilioResponse.successful)  {
      //code sent
    } else {
      //print(twilioResponse.errorMessage);
    }