AWS Cognito that triggers Lambda function and sends me a notification when a new user signs up using SNS

Question

Implementing an AWS Lambda function that sends me an email upon successful user sign-up verification is what I'm trying to do. The issue is that while I receive an email when I test the lambda function, when I add the lambda trigger for "Post Confirmation," the mail is instead delivered to the individual who joins up. I think I made myself clear; this is where the Lambda function is:

import json
import boto3

def lambda_handler(event, context):
    
    client = boto3.client("sns")
    
    message = {
        "eventName": "newUser",
        "email": event["request"]["userAttributes"]["email"],
        "name": event["request"]["userAttributes"]["name"],
        "sub": event["request"]["userAttributes"]["sub"]
    }
    
    response = client.publish(
        TopicArn="arnfortheawssns",
        Message=json.dumps(message)
    )
    
    # TODO implement
    return {
        'statusCode': 200,
        'body': json.dumps(response)
    }

Since I received the notice email in tests, I am confident that I am using the correct ARN.

I'm combining SNS, Cognito, and AWS Lambda. I attempted to get an email notification whenever a user signs up, but the user who signs up gets the email instead of me.