> Documentation index: https://www.gooddata.ai/docs/gooddata-ui/llms.txt lists every page of these docs as Markdown.

# NotAuthenticatedHandler

- Package: [@gooddata/sdk-backend-spi](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-backend-spi/index.md)
- Kind: type-alias
- Source: https://github.com/gooddata/gooddata-ui-sdk/blob/rel/11.64/libs/sdk-backend-spi/src/backend/index.ts
- Guides: [Renew the session without a redirect](https://www.gooddata.ai/docs/gooddata-ui/latest/integrations/renew-session-silently/index.md)

Type of the function to be called when the Analytical Backend raises a [NotAuthenticated](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-backend-spi/sdk-backend-spi.notauthenticated/index.md) error. See [IAuthenticationProvider.onNotAuthenticated](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-backend-spi/sdk-backend-spi.iauthenticationprovider/index.md#iauthenticationprovideronnotauthenticated) for more details.

**Signature:**

```typescript
export type NotAuthenticatedHandler = (context: IAuthenticationContext, error: NotAuthenticated) => void;
```
**References:** [IAuthenticationContext](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-backend-spi/sdk-backend-spi.iauthenticationcontext/index.md), [NotAuthenticated](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-backend-spi/sdk-backend-spi.notauthenticated/index.md)