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---
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
---
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
[Home](./index.md) > [@loopback/authentication](./authentication.md) > [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)<!-- --><{}>
</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