Returns details about the IAM user or role whose credentials are used to call the operation.
No permissions are required to perform this operation. If an administrator adds a
policy to your IAM user or role that explicitly denies access to the
sts:GetCallerIdentity action, you can still perform this operation.
Permissions are not required because the same information is returned when an IAM user
or role is denied access. To view an example response, see I Am Not Authorized to Perform: iam:DeleteVirtualMFADevice in the
IAM User Guide.