Commands that begin with the euare- prefix are
compatible with AWS Identity Management and Access Control
An account has two identifiers: a numeric ID and a human-readable alias. For a new account, the human-readable alias is the name given at the account's creation time. If you deleted your account alias, use this command to add a new one using your account's numeric ID.
Assume a role by using the Amazon Resource Name (ARN) to get temporary security credentials for that role. Then configure those credentials so subsequent actions work using the role's permissions. The ARN always prepends to the left of the command to complete the string.