---
lang: en
title: 'API docs: security.principal._securityid_'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/packages/security
permalink: /doc/en/lb4/apidocs.security.principal._securityid_.html
---

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[Home](./index.md) &gt; [@loopback/security](./security.md) &gt; [Principal](./security.principal.md) &gt; [\[securityId\]](./security.principal._securityid_.md)

## Principal.\[securityId\] property

Name/id

<b>Signature:</b>

```typescript
[securityId]: string;
```

