Hi, there.
I have gone through your post and can see that you want to add the AWS Cognito User Pool Signup and Signin, and Logout functionality and Codestar.
I think you want to use AWS as the backend on your website.
I have to build using AWS amplify graphql backend and React styled component frontend.
I have so deep knowledge of AWS amplify + React development.
I have experience developing the event website using amplify and React(Angular & Vue).
Front-End development using special framework needs it's all concepts, so I know almost all modern concepts and hooks in React.js from experience of many years.
I have mastered Cognito User Pool, DynamoDB and Datastore, S3 Storage, GraphQL schema design, CodeCommit, and Lambda function offered in AWS and React/Redux/Redux-firebase/Saga/Styled component/Material UI, etc.
Also, I have deep experienced in Git including pull requesting and repository management, so that you can check work progress anytime when you want.
I will finish this project asap for you and me.
I want to discuss your project in more detail.
I wish to succeed in your website.