Updates the name and/or the path of the specified IAM user.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/iam/update-user.html
| aws iam update-user --user-name peter --new-user-name peter.franklin |
| Change IAM Username With AWS CLI - Ruan Bekker's Blog : http://blog.ruanbekker.com/blog/2017/08/28/change-iam-username-with-aws-cli/ |
| aws iam update-user --user-name Bob --new-user-name Robert |
| update-user — AWS CLI 1.16.7 Command Reference : http://docs.aws.amazon.com/cli/latest/reference/iam/update-user.html |