iam_list_users.py

iam_client=boto3.client('iam')

items = []
response = iam_client.list_users()
while response:
    items += response['Users']
    response = iam_client.list_roles(Marker=response['Marker']) if 'Marker' in response else None          
user_df = pd.DataFrame (items)

display (md(""" ## IAM Users Summary
            * No .of Users: {nousers}
            * Latest Created User : {latestuser}({latestcreateddate})
            * Oldest User : {oldestuser}, ({oldestcreateddate})
            """.format(nousers=len(user_df),latestuser=user_df[user_df.CreateDate == user_df.CreateDate.max()].Arn.tolist()[0], oldestuser = user_df[user_df.CreateDate == user_df.CreateDate.min()].Arn.tolist()[0], oldestcreateddate=user_df.CreateDate.min(), latestcreateddate=user_df.CreateDate.max()  )
           ))

display (md(""" ## List of Users """))
display(HTML(user_df.to_html(index=False, justify="left")))