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lang: en
title: 'API docs: authentication-passport.strategyadapter'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/extensions/authentication-passport
permalink: /doc/en/lb4/apidocs.authentication-passport.strategyadapter.html
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[Home](./index.md) > [@loopback/authentication-passport](./authentication-passport.md) > [StrategyAdapter](./authentication-passport.strategyadapter.md)
## StrategyAdapter class
Adapter class to invoke passport-strategy 1. provides express dependencies to the passport strategies 2. provides shimming of requests for passport authentication 3. provides life-cycle similar to express to the passport-strategy 4. provides state methods to the strategy instance see: https://github.com/jaredhanson/passport
<b>Signature:</b>
```typescript
export declare class StrategyAdapter<U> implements AuthenticationStrategy
```
<b>Implements:</b> [AuthenticationStrategy](./authentication.authenticationstrategy.md)
## Constructors
| Constructor | Modifiers | Description |
| --- | --- | --- |
| [(constructor)(strategy, name, userProfileFactory)](./authentication-passport.strategyadapter._constructor_.md) | | Constructs a new instance of the <code>StrategyAdapter</code> class |
## Properties
| Property | Modifiers | Type | Description |
| --- | --- | --- | --- |
| [name](./authentication-passport.strategyadapter.name.md) | | string | |
## Methods
| Method | Modifiers | Description |
| --- | --- | --- |
| [authenticate(request, options)](./authentication-passport.strategyadapter.authenticate.md) | | The function to invoke the contained passport strategy. 1. Create an instance of the strategy 2. add success and failure state handlers 3. authenticate using the strategy |