> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainlit.io/llms.txt
> Use this file to discover all available pages before exploring further.

# on_logout

Decorator to react to a user logging out. Useful to clear cookies or other user data through the HTTP response.

## Parameters

<ParamField path="request" type="fastapi.Request">
  The request object.
</ParamField>

<ParamField path="response" type="fastapi.Response">
  The response object.
</ParamField>

## Usage

```python theme={null}
from fastapi import Request, Response

import chainlit as cl


@cl.on_logout
def main(request: Request, response: Response):
    response.delete_cookie("my_cookie")
```