{"id":"iam-username-key-only-iam-users","text":"The `aws:username` condition key is only available for IAM users — it is not available for the root user, IAM roles, anonymous requests, or IAM Identity Center credentials.","truth_value":"IN","source":"entries/2026/03/11/IAM-latest-UserGuide-reference_policies_condition-keyshtml.md","source_url":"","source_hash":"e2027fc5516d6eee","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"iam-username-key-only-iam-users","truth_value":"IN","reason":"premise"}]}}