<!--
{
  "availability" : [
    "iOS: 26.0.0 -",
    "iPadOS: 26.0.0 -",
    "macCatalyst: 26.0.0 -",
    "macOS: 26.0.0 -",
    "visionOS: 26.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AuthenticationServices",
  "identifier" : "/documentation/AuthenticationServices/ASAuthorizationAccountCreationPlatformPublicKeyCredentialRequest/userID",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Authentication Services"
    ],
    "preciseIdentifier" : "s:22AuthenticationServices64ASAuthorizationAccountCreationPlatformPublicKeyCredentialRequestC6userID10Foundation4DataVvp"
  },
  "title" : "userID"
}
-->

# userID

A stable, opaque identifier for the created account. This will be saved as the userID for the created passkey.

```
final let userID: Data
```

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)