---
lang: en
title: 'API docs: authentication.getauthenticatemetadata'
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.getauthenticatemetadata.html
---

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[Home](./index.md) &gt; [@loopback/authentication](./authentication.md) &gt; [getAuthenticateMetadata](./authentication.getauthenticatemetadata.md)

## getAuthenticateMetadata() function

Fetch authentication metadata stored by `@authenticate` decorator.

**Signature:**

```typescript
export declare function getAuthenticateMetadata(targetClass: Constructor<{}>, methodName: string): AuthenticationMetadata[] | undefined;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td markdown="1">

targetClass


</td><td markdown="1">

[Constructor](./context.constructor.md)<!-- -->&lt;{}&gt;


</td><td markdown="1">

Target controller


</td></tr>
<tr><td markdown="1">

methodName


</td><td markdown="1">

string


</td><td markdown="1">

Target method


</td></tr>
</tbody></table>

**Returns:**

[AuthenticationMetadata](./authentication.authenticationmetadata.md)<!-- -->\[\] \| undefined