aws cli user name in the environment code example

Example: aws configure change default profile

$ aws configure
AWS Access Key ID [****************FFGG]: ZZZZZZCCCDDDEEEFFFZZ
AWS Secret Access Key [****************mmmn]: zzzzzzcccdddeeefffggghhhiiijjjkkklllmmzz
Default region name [us-east-1]: us-west-2
Default output format [text]: json