# GCPMountAuthConfig

> **Class** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/sandbox/_mounts/GCPMountAuthConfig)

GCP credentials used by the backend to authenticate GCS mounts.

## Signature

```python
GCPMountAuthConfig()
```

## Extends

- `TypedDict`

## Constructors

```python
__init__(
    service_account_json: SandboxProxySecret,
)
```

| Name | Type |
|------|------|
| `service_account_json` | `SandboxProxySecret` |


## Properties

- `service_account_json`

---

[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/d6cd6082f09e7826a2d6afe444ae6119e61b82a6/python/langsmith/sandbox/_mounts.py#L114)