# AuthHeaders

> **Class** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/run_trees/AuthHeaders)

Custom authentication headers for write replicas.

## Signature

```python
AuthHeaders()
```

## Extends

- `TypedDict`

## Constructors

```python
__init__(
    api_key: str,
    service_key: str,
    tenant_id: str,
    authorization: str,
    cookie: str,
)
```

| Name | Type |
|------|------|
| `api_key` | `str` |
| `service_key` | `str` |
| `tenant_id` | `str` |
| `authorization` | `str` |
| `cookie` | `str` |


## Properties

- `api_key`
- `service_key`
- `tenant_id`
- `authorization`
- `cookie`

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[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/6a74bf5af9e542d8065af8edca54b2448f430916/python/langsmith/run_trees.py#L43)