Creates an AWS service account for AWS CLI to avoid having to re-login every day via SSO with 'aws sso login'
Grants this service account Administator privileges in the current AWS account
Creates an IAM access key (deleting an older unused key if necessary), writes a CSV just as the UI download would, and outputs both shell export commands and configuration in the format for copying to your AWS profile in ~/.aws/credentials
- keyfile (default: ~/.aws/keys/\${user}_\${aws_account_id}_accessKeys.csv) - be careful if specifying this, a non-existent keyfile will create a new key, deleting the older of 2 existing keys if necessary to be able to create this