AwsSSORoleHelper

This is a simple utility script that allows you to retrieve credentials for AWS accounts that are secured using AWS SSO.
Access tokens are cached locally to prevent the need to be pushed to a web browser each time you invoke the script (this is similar behaviour to aws cli v2).
Main usability enhancement compared to aws cli 2 is the abillity to retrieve all credentials for all accounts that you have access to.  
You can optionally specify a rolename with the -RoleName parameter and retrieve all credentials for that rolename across all of your accounts.
Alternatively you can specify an AccountID by using the -AccountID parameter and retrieve all credentials for that AccountID.
Region is set to US-East-1 by default as this is the only region that currently supports AWS SSO.