passwordless authentication with amplify and cognito

I need password less authentication similar to
https://dev.to/duarten/passwordless-authentication-with-cognito-13c or
https://techinscribed.com/passwordless-phone-number-authentication-using-aws-amplify-cognito/

i have set up all the infra and have the sample app, I need someone who is good in javascript,amplify and cognito authentication.