title: How to do a password less signin in flutter with AWS
body: <p>I am unable to know how to do <a href="https://aws.amazon.com/blogs/mobile/implementing-passwordless-email-authentication-with-amazon-cognito/" rel="nofollow noreferrer">passwordless signin</a> <a href="https://techinscribed.com/passwordless-phone-number-authentication-using-aws-amplify-cognito/" rel="nofollow noreferrer">with OTP</a> using cognito in flutter.
  I just need assistance with the flutter code for sending the OTP and answering the auth challenger with any working cognito/amplify package.</p>