Cognito on Lonfo Blog

Daily Actions: Read your data back with a DynamoDB Query behind GET /actions

Tue, 20 Oct 2026 09:00:00 +0200

Daily Actions: Read your data back with a DynamoDB Query behind GET /actions

In the previous article, our users learned to write: a signed-in user sends an action to POST /actions, a Lambda stores it in DynamoDB, and anonymous requests are rejected. But if you add a task and refresh the /todo page, the list stays empty. Nothing reads the data back.

In this article we add the missing half: a GET /actions endpoint that returns only the actions of the signed-in user, using a DynamoDB Query.

Daily Actions: Save data in DynamoDB through an API Gateway and Lambda secured by Cognito

Tue, 13 Oct 2026 09:00:00 +0200

Daily Actions: Save data in DynamoDB through an API Gateway and Lambda secured by Cognito

In the previous article, our static Next.js application learned to authenticate users with Amazon Cognito. But a login page protects nothing by itself: as long as our backend accepts anonymous requests, anyone can write into our database.

In this article we connect the pieces. The signed-in user will send a new action to an API Gateway endpoint, a Lambda function will insert it into DynamoDB, and only requests carrying a valid Cognito token will get through.

Daily Actions: Secure your Next.js application with AWS Cognito and CDK

Fri, 25 Sep 2026 08:15:36 +0200

Daily Actions: Secure your Next.js application with AWS Cognito and CDK

Now that our Next.js application is live on S3 and CloudFront, it’s time to add an essential component: authentication. With a static export architecture, traditional server-based solutions (like NextAuth.js with Node.js API routes) do not work directly.

We will use AWS Cognito to manage our users (User Pool) and integrate the AWS SDK (or Amplify) on the front-end to connect our static application securely. CDK handles all the infrastructure configuration.