---
lang: en
title: 'API docs: authentication.authenticationbindings'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.authentication.authenticationbindings.html
---

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[Home](./index.md) &gt; [@loopback/authentication](./authentication.md) &gt; [AuthenticationBindings](./authentication.authenticationbindings.md)

## AuthenticationBindings namespace

Binding keys used by this component.

<b>Signature:</b>

```typescript
export declare namespace AuthenticationBindings 
```

## Variables

|  Variable | Description |
|  --- | --- |
|  [AUTH\_ACTION](./authentication.authenticationbindings.auth_action.md) | Key used to inject the authentication function into the sequence. |
|  [AUTHENTICATION\_STRATEGY\_EXTENSION\_POINT\_NAME](./authentication.authenticationbindings.authentication_strategy_extension_point_name.md) |  |
|  [CURRENT\_USER](./authentication.authenticationbindings.current_user.md) | Key used to inject the user instance retrieved by the authentication function |
|  [METADATA](./authentication.authenticationbindings.metadata.md) | Key used to inject authentication metadata, which is used to determine whether a request requires authentication or not. |
|  [STRATEGY](./authentication.authenticationbindings.strategy.md) | Key used to bind an authentication strategy to the context for the authentication function to use. |


