---
lang: en
title: 'API docs: authentication-passport.strategyadapter._constructor_'
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._constructor_.html
---

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[Home](./index.md) &gt; [@loopback/authentication-passport](./authentication-passport.md) &gt; [StrategyAdapter](./authentication-passport.strategyadapter.md) &gt; [(constructor)](./authentication-passport.strategyadapter._constructor_.md)

## StrategyAdapter.(constructor)

Constructs a new instance of the `StrategyAdapter` class

<b>Signature:</b>

```typescript
constructor(strategy: Strategy, name: string, userProfileFactory?: UserProfileFactory<U>);
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  strategy | Strategy | instance of a class which implements a [passport-strategy](http://passportjs.org/)<!-- -->. |
|  name | string |  |
|  userProfileFactory | [UserProfileFactory](./authentication.userprofilefactory.md)<!-- -->&lt;U&gt; | <i>(Optional)</i> |


