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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [Fetch](./puppeteer.protocol.fetch.md) &gt; [AuthChallenge](./puppeteer.protocol.fetch.authchallenge.md) &gt; [scheme](./puppeteer.protocol.fetch.authchallenge.scheme.md)

## Protocol.Fetch.AuthChallenge.scheme property

The authentication scheme used, such as basic or digest

<b>Signature:</b>

```typescript
scheme: string;
```