# GoogleCloudAuth

class in `3d-tiles-renderer/core/plugins`

```js
import { GoogleCloudAuth } from '3d-tiles-renderer/core/plugins';
```

Authentication helper for Google Cloud Maps APIs. Manages session-token creation and
renewal for both the Photorealistic 3D Tiles API and the 2D Map Tiles API, injecting
the API key and session token into outgoing requests.

## Constructor

```js
new GoogleCloudAuth( options?: Object )
```

- `options`, `Object`, optional, default `{}`
  - `apiToken`, `string`
  - `sessionOptions`, `Object | null`, optional, default `null`
  - `autoRefreshToken`, `boolean`, optional, default `false`

## Properties

### .apiToken: string

The Google Cloud API key.

### .autoRefreshToken: boolean

Whether to automatically refresh the session token on 4xx errors.

### .authURL: string

The endpoint URL used to create or refresh the session token.

### .sessionToken: string | null

The current session token, or null if not yet established.

### .sessionOptions: Object | null

Session options passed as the POST body when creating a Map Tiles session.