aws find username by access key

find_username_by_access_key.py

# example: python find_username_by_access_key.py <your_key>

import sys, boto3

TARGET_ACCESS_KEY = sys.argv[1]
client = boto3.client('iam')
paginator = client.get_paginator('list_users')
response_iterator = paginator.paginate(
    PaginationConfig={
        'MaxItems': 150,
        'PageSize': 150})

for page in response_iterator:
    u = page['Users']
    for user in u:
        for key_result in client.list_access_keys(UserName = user['UserName'])['AccessKeyMetadata']:
            aws_access_key = key_result['AccessKeyId']
            if aws_access_key == TARGET_ACCESS_KEY:
                print 'User: ' + user['UserName']
                print 'Key: ' + aws_access_key