Update Route53 Entry with IP from dyndns clients

dynamicDns.py

import json
import boto3
import base64
import os

def lambda_handler(event, context):
    client = boto3.client('route53')
    
    username,password = base64.b64decode(event.get("headers").get("Authorization").replace("Basic ", "")).decode().split(":")
    if not password or not password == os.environ.get("password"):
        return {
            'statusCode': 403,
            'body': "Your Password is wrong"
        }

    parameters = event.get("queryStringParameters", {})
    hostname = parameters.get('hostname')
    ip = parameters.get('myip')
    source_ip = event.get('requestContext').get('identity').get('sourceIp')
    
    if source_ip != ip:
        print("queryStringParameters IP {} is not equal sourceIP {}".format(ip, source_ip))
        return {
            'statusCode': 400,
            'body': "queryStringParameters IP {} is not equal sourceIP {}".format(ip, source_ip)
        }
        

    response = client.change_resource_record_sets(
        HostedZoneId=username,
        ChangeBatch={
            "Comment": "Automatic DNS update",
            "Changes": [
                
                {
                    'Action': 'UPSERT',                            # INSERT, really!
                    'ResourceRecordSet' : {
                        "Name": hostname,
                        'Type' : 'A',
                        #"Region": "eu-west-1",
                        'TTL' : 15,
                        'ResourceRecords' : [
                            {'Value': ip}
                        ]
                    }
                }
            ]
        }
    )
    return {
        'statusCode': 200,
        'body': "DNS updated"
    }