Refresh Page after verification code is entered

Yes, you can achieve this behavior using AWS Lambda functions in conjunction with Amazon Cognito. Here's how you can implement this:

1. Set up a Custom Message Lambda trigger for your Cognito User Pool. This trigger will be invoked when Cognito sends out verification messages.

2. In this Lambda function, you can customize the verification message to include a link to your application's page, rather than the default Cognito verification page.

3. Create an API Gateway endpoint and associate it with another Lambda function. This function will handle the verification process.

4. When the user clicks the link in the verification message, they'll be directed to your application. Your application can then call the API Gateway endpoint, passing the verification parameters.

5. The Lambda function behind the API Gateway will use the Cognito API to confirm the user's account and then return a success response.

6. Upon receiving the success response, your application can refresh the page and initiate a login check.

Here's a basic outline of what the Lambda function behind the API Gateway might look like:

import boto3

def lambda_handler(event, context):
    cognito = boto3.client('cognito-idp')
    
    # Extract parameters from the event
    username = event['queryStringParameters']['username']
    confirmation_code = event['queryStringParameters']['code']
    client_id = 'YOUR_COGNITO_CLIENT_ID'

    try:
        # Confirm the user's account
        cognito.confirm_sign_up(
            ClientId=client_id,
            Username=username,
            ConfirmationCode=confirmation_code
        )
        
        # If successful, return a response that will trigger a page refresh
        return {
            'statusCode': 200,
            'body': 'Account confirmed successfully',
            'headers': {
                'Content-Type': 'text/html',
                'Refresh': '0; url=YOUR_APP_URL'
            }
        }
    except Exception as e:
        # Handle any errors
        return {
            'statusCode': 400,
            'body': str(e)
        }

This approach allows you to customize the verification flow, confirm the user's account, and then refresh the page to start a login check, all without returning to an empty create account view.
Sources
Cognito Intermittent Error on Custom Lambda Trigger that redirects to login page solution at ConfirmSignUp. | AWS re:Post
How can I issue an access token immediately after account confirmation in AWS Cognito without requiring the user to log in again? | AWS re:Post

Hi,

To refresh the page after Cognito verification code entry instead of showing an empty create account view, you can implement this solution using AWS Lambda and API Gateway:

1. Create a Lambda function to handle verification:

import boto3
import json

def lambda_handler(event, context):
    cognito = boto3.client('cognito-idp')
    
    # Extract parameters from the event
    body = json.loads(event.get('body', '{}'))
    username = body.get('username')
    confirmation_code = body.get('code')
    client_id = 'YOUR_CLIENT_ID'

    try:
        # Confirm signup
        cognito.confirm_sign_up(
            ClientId=client_id,
            Username=username,
            ConfirmationCode=confirmation_code
        )
        
        return {
            'statusCode': 200,
            'headers': {
                'Access-Control-Allow-Origin': '*',
                'Content-Type': 'application/json'
            },
            'body': json.dumps({
                'success': True,
                'shouldRefresh': True
            })
        }
        
    except Exception as e:
        return {
            'statusCode': 400,
            'headers': {
                'Access-Control-Allow-Origin': '*',
                'Content-Type': 'application/json'
            },
            'body': json.dumps({
                'success': False,
                'message': str(e)
            })
        }

2. Frontend code to handle verification:

async function handleVerification(username, code) {
    try {
        const response = await fetch('YOUR_API_ENDPOINT', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                username: username,
                code: code
            })
        });

        const data = await response.json();
        if (data.shouldRefresh) {
            window.location.reload();
        }
    } catch (error) {
        console.error('Verification failed:', error);
    }
}

Setup steps:

1. Create the Lambda function
2. Set up API Gateway endpoint and integrate with Lambda
3. Configure CORS in API Gateway
4. Set appropriate IAM permissions for Lambda to access Cognito

For more information, see:

• AWS Lambda Developer Guide
• Amazon Cognito Developer Guide
• API Gateway Developer Guide