sourceIdentity

The source identity specified by the principal that is calling the AssumeRoot operation.

You can use the aws:SourceIdentity condition key to control access based on the value of source identity. For more information about using source identity, see Monitor and control actions taken with assumed roles in the IAM User Guide.

The regex used to validate this parameter is a string of characters consisting of upper- and lower-case alphanumeric characters with no spaces. You can also include underscores or any of the following characters: =,.@-