@loopback/docs/site/apidocs/authentication.tokenservice.revoketoken.md

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

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[Home](./index.md) &gt; [@loopback/authentication](./authentication.md) &gt; [TokenService](./authentication.tokenservice.md) &gt; [revokeToken](./authentication.tokenservice.revoketoken.md)

## TokenService.revokeToken() method

Revokes a given token (if supported by token system)

**Signature:**

```typescript
revokeToken?(token: string): Promise<boolean>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  token | string | The token/secret which should be revoked/invalidated. |

**Returns:**

Promise&lt;boolean&gt;

true, if the given token was invalidated.