https://www.youtube.com/playlist?list=PLDckhLrNepPR8y-9mDXsLutiwsLhreOk1
You follow the directions in the first video to setup AWS Cognito and add your configuration to the file they mention in the video
Next run npm install
Run npm start
and a browser will open.
In crome, open your console before you login. When you login you'll see session information wich contains an idToken which will contain:
{ jwtToken: "An absurdly large string" }