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> Use this file to discover all available pages before exploring further.

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# credentials

# `prefect_databricks.credentials`

Credential classes used to perform authenticated interactions with Databricks

## Classes

### `DatabricksCredentials` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-databricks/prefect_databricks/credentials.py#L13" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

Block used to manage Databricks authentication.

Supports two authentication methods:

1. Personal Access Token (PAT): Provide a `token` field.
2. Service Principal (OAuth 2.0): Provide `client_id`, `client_secret`,
   and optionally `tenant_id` for Azure Databricks.

**Attributes:**

* `databricks_instance`:
  Databricks instance used in formatting the endpoint URL.
* `token`: The token to authenticate with Databricks (for PAT authentication).
* `client_id`: The service principal client ID (for OAuth authentication).
* `client_secret`: The service principal client secret (for OAuth authentication).
* `tenant_id`: The tenant ID for Azure Databricks (optional, for OAuth authentication).
* `client_kwargs`: Additional keyword arguments to pass to AsyncClient.

**Examples:**

Load stored Databricks credentials using PAT:

```python  theme={null}
from prefect_databricks import DatabricksCredentials

databricks_credentials_block = DatabricksCredentials.load("BLOCK_NAME")
```

Using service principal authentication:

```python  theme={null}
from prefect_databricks import DatabricksCredentials

credentials = DatabricksCredentials(
    databricks_instance="dbc-abc123-def4.cloud.databricks.com",
    client_id="my-client-id",
    client_secret="my-client-secret",
)
client = credentials.get_client()
```

**Methods:**

#### `get_client` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-databricks/prefect_databricks/credentials.py#L211" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python  theme={null}
get_client(self) -> AsyncClient
```

Gets a Databricks REST AsyncClient.

**Returns:**

* A Databricks REST AsyncClient.

#### `validate_auth_method` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-databricks/prefect_databricks/credentials.py#L95" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python  theme={null}
validate_auth_method(cls, values: Dict[str, Any]) -> Dict[str, Any]
```

Validates that either PAT or service principal authentication is configured,
but not both.

Valid configurations:

1. token only (PAT authentication)
2. client\_id + client\_secret (service principal authentication)
3. client\_id + client\_secret + tenant\_id (Azure service principal authentication)


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