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# credentials
# `prefect_slack.credentials`
Credential classes use to store Slack credentials.
## Classes
### `SlackCredentials`
Block holding Slack credentials for use in tasks and flows.
**Args:**
* `token`: Bot user OAuth token for the Slack app used to perform actions.
**Examples:**
Load stored Slack credentials:
```python theme={null}
from prefect_slack import SlackCredentials
slack_credentials_block = SlackCredentials.load("BLOCK_NAME")
```
Get a Slack client:
```python theme={null}
from prefect_slack import SlackCredentials
slack_credentials_block = SlackCredentials.load("BLOCK_NAME")
client = slack_credentials_block.get_client()
```
**Methods:**
#### `get_client`
```python theme={null}
get_client(self) -> AsyncWebClient
```
Returns an authenticated `AsyncWebClient` to interact with the Slack API.
### `SlackWebhook`
Block holding a Slack webhook for use in tasks and flows.
**Args:**
* `url`: Slack webhook URL which can be used to send messages
(e.g. `https\://hooks.slack.com/XXX`).
**Examples:**
Load stored Slack webhook:
```python theme={null}
from prefect_slack import SlackWebhook
slack_webhook_block = SlackWebhook.load("BLOCK_NAME")
```
Get a Slack webhook client:
```python theme={null}
from prefect_slack import SlackWebhook
slack_webhook_block = SlackWebhook.load("BLOCK_NAME")
client = slack_webhook_block.get_client()
```
Send a notification in Slack:
```python theme={null}
from prefect_slack import SlackWebhook
slack_webhook_block = SlackWebhook.load("BLOCK_NAME")
slack_webhook_block.notify("Hello, world!")
```
**Methods:**
#### `get_client`
```python theme={null}
get_client(self, sync_client: bool = False) -> Union[AsyncWebhookClient, WebhookClient]
```
Returns an authenticated `AsyncWebhookClient` to interact with the configured
Slack webhook.
#### `notify`
```python theme={null}
notify(self, body: str, subject: Optional[str] = None)
```
Sends a message to the Slack channel.
#### `notify_async`
```python theme={null}
notify_async(self, body: str, subject: Optional[str] = None)
```
Sends a message to the Slack channel asynchronously.
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