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

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[Home](./index.md) &gt; [@loopback/authentication](./authentication.md) &gt; [AUTHENTICATION\_STRATEGY\_NOT\_FOUND](./authentication.authentication_strategy_not_found.md)

## AUTHENTICATION\_STRATEGY\_NOT\_FOUND variable

**Signature:**

```typescript
AUTHENTICATION_STRATEGY_NOT_FOUND = "AUTHENTICATION_STRATEGY_NOT_FOUND"
```