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lang: en
title: 'API docs: security.defaultsubject.getprincipal'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/security
permalink: /doc/en/lb4/apidocs.security.defaultsubject.getprincipal.html
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[Home](./index.md) > [@loopback/security](./security.md) > [DefaultSubject](./security.defaultsubject.md) > [getPrincipal](./security.defaultsubject.getprincipal.md)
## DefaultSubject.getPrincipal() method
<b>Signature:</b>
```typescript
getPrincipal(type: string): Principal | undefined;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| type | string | |
<b>Returns:</b>
[Principal](./security.principal.md) \| undefined