# Auth

> **Class** in `@langchain/langgraph-sdk`

📖 [View in docs](https://reference.langchain.com/javascript/langchain-langgraph-sdk/auth/Auth)

## Signature

```javascript
class Auth
```

## Constructors

- [`constructor()`](https://reference.langchain.com/javascript/langchain-langgraph-sdk/auth/Auth/constructor)

## Methods

- [`authenticate()`](https://reference.langchain.com/javascript/langchain-langgraph-sdk/auth/Auth/authenticate)
- [`on()`](https://reference.langchain.com/javascript/langchain-langgraph-sdk/auth/Auth/on)

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[View source on GitHub](https://github.com/langchain-ai/langgraphjs/blob/dc37d3cd62bf88272cdc874e37354ae83ac01660/libs/sdk/src/auth/index.ts#L11)