Aws S3 event, get user name

Question

I have objects on S3 glacier deep archives. I want to send an email to the user who request the restoration when the restoration is complete.

For that, my idea is to use S3 event to trigger a lambda function, and use this lambda function to send email.

The issue is that i don't know how to found informations about the users who request the restoration. I found the id, but then, how to use the id ? If i have the username i Can easly found tag associated with this username (and so, the email adress as it's a tag of my users) but i don't know how to use the id to found the username.

If someone has an Idea ?

Answer 1

Finally i found a solution, i don't know if it's the best, but at least it work for me: As all my users as a tag "mail_adress" i can search this tag from the user id with this code:

import boto3


iam = boto3.client('iam')



response = iam.get_account_authorization_details(Filter=['User'])

for i in range(len(response['UserDetailList'])):
    if response['UserDetailList'][i]['UserId'] ==  id_user:
        for y in range(len(response['UserDetailList'][i]['Tags'])):
            if response['UserDetailList'][i]['Tags'][y]['Key'] == 'mail_adress':
                mail_adresse = response['UserDetailList'][i]['Tags'][y]['Value']

print(mail_adress)