This article discusses the integration of AWS Cognito with Fauna, a modern data API. To authenticate users, AWS Cognito is used in conjunction with Fauna's native authentication system. The process involves creating a new Cognito User Pool and App Client, adding Cognito to the client application, configuring Fauna, creating a Lambda function, and attaching it to the Pre Token Generation trigger in AWS Cognito. The article provides step-by-step instructions on how to integrate these services, including creating a sample React application and using Fauna's query language to retrieve data. The integration allows users to sign up, confirm their account, log in, and access their data stored in Fauna.