git clone https://github.com/ysfmag/aws-amplify-react-custom-ui-example.git cd aws-amplify-react-custom-ui-example amplify init amplify add auth yarn yarn startin the file src/index.js you need to uncomment those line
// import awsconfig from "./aws-exports"; // Amplify.configure(awsconfig);Code Example for usign aws-amplify-react-custom-ui lib
https://stackblitz.com/github/ysfmag/aws-amplify-react-custom-ui-example