https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/migrate-granularaccess-iam-mapping-reference.html
https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/migrate-granularaccess-whatis.html#migrate-user-permissions
https://aws.amazon.com/blogs/aws-cloud-financial-management/changes-to-aws-billing-cost-management-and-account-consoles-permissions/
