Serverless Stack

Hey, I am trying to implement the google sign-in in my serverless app, using the docs - <https://docs.amplify.aws/lib/auth/advanced/q/platform/js/#google-sign-in-react|https://docs.amplify.aws/lib/auth/advanced/q/platform/js/#google-sign-in-react>, but facing an issue “popup_closed_by_user” in every browser. I haven't blocked the cache. Can someone help me in solving please?

check this tutorial
<https://serverless-stack.com/examples/how-to-add-google-login-to-your-cognito-user-pool.html|https://serverless-stack.com/examples/how-to-add-google-login-to-your-cognito-user-pool.html>

Thanks, but it would have been better if you add in the previous note taking app. I am following the previous one so it's getting bit complicated for me to implement.

Also I want to make it two way flow, like a new user will sign up and old will sign In, if the old user try to sign up again, it ll display an error “user already exists”. How can I do it ?

OAuth is one way flow. Technically you only have sign-in