@loopback/docs/site/apidocs/authentication-jwt.jwtauthenticationstrategy.extractcredentials.md

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---
lang: en
title: 'API docs: authentication-jwt.jwtauthenticationstrategy.extractcredentials'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/extensions/authentication-jwt
permalink: /doc/en/lb4/apidocs.authentication-jwt.jwtauthenticationstrategy.extractcredentials.html
---

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[Home](./index.md) &gt; [@loopback/authentication-jwt](./authentication-jwt.md) &gt; [JWTAuthenticationStrategy](./authentication-jwt.jwtauthenticationstrategy.md) &gt; [extractCredentials](./authentication-jwt.jwtauthenticationstrategy.extractcredentials.md)

## JWTAuthenticationStrategy.extractCredentials() method

<b>Signature:</b>

```typescript
extractCredentials(request: Request): string;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  request | Request |  |

<b>Returns:</b>

string