In this tutorial, I will share how to automatically confirm users in your application without sending the confirmation code.

When users signup in for your application normally you will send a confirmation code in their email or phone to confirm their account.

This tutorial will be helpful if you are using AWS Cognito. Assuming you want to auto-confirm your user’s email and phone numbers. This can be done using a Lambda function.

STEPS

• Create a Lambda function name it confirmSignUp. For this tutorial, I will use runtime Node.js 18.x.
• Copy the following and paste it in the index.mjs file.

export const handler = (event, context, callback) => {

    // Confirm the user
        event.response.autoConfirmUser = true;

    // Set the email as verified if it is in the request
    if (event.request.userAttributes.hasOwnProperty("email")) {
        event.response.autoVerifyEmail = true;
    }

    // Set the phone number as verified if it is in the request
    if (event.request.userAttributes.hasOwnProperty("phone_number")) {
        event.response.autoVerifyPhone = true;
    }

    // Return to Amazon Cognito
    callback(null, event);
};

• Save the Lambda function and go back to AWS Cognito dashboard. 
• Select user pool and go to User pool properties and click Add Lambda trigger.

• Under Lambda triggers Select Sign-up as Trigger type and under sign-up select Pre sign-up trigger option. Pre sign-up trigger will be disabled once you add lambda for this option.

• Finally select your Lambda function and click Add Lambda trigger button.