Get an IAM user or role whose credentials are used to call the operation

Security Token Service (STS) allows to request temporary credentials for (IAM) users or federated users.
More information: <https://docs.aws.amazon.com/cli/latest/reference/sts/>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

aws sts get-caller-identity

click the source code to copy install aws sts on any operating system with command-not-found.com