Pusher Authentication

Authenticate a user to a private channel

Args: request (Request): The request object tenant_id (str, optional): The tenant ID. Defaults to Depends(verify_bearer_token). pusher_client (Pusher, optional): Pusher client. Defaults to Depends(get_pusher_client).

Raises: HTTPException: 403 if the user is not allowed to access the channel.

Returns: dict: The authentication response.