Add auth data for aiozk

[lyncir]

Can you add auth_data when ZKClient instance like KazooClient(auth_data=auth_data)?
Or that would work not good?

For example:

class MyZKClient(ZKClient):

    def __init__(
            self,
            servers,
            chroot=None,
            session_timeout=10,
            default_acl=None,
            retry_policy=None,
            allow_read_only=False,
            read_timeout=None,
            loop=None,
            auth_data=None,
    ):
        super().__init__(servers, chroot, session_timeout, default_acl,
                         retry_policy, allow_read_only, read_timeout,
                         loop)
        self.auth_data = auth_data

    async def send(self, request):
        try:
            return await super().send(request)

        except NoAuth:

            if self.auth_data:
                await super().send(self.auth_data)

                return await super().send(request)


auth_data = AuthRequest(type=0, scheme='digest', auth=auth)
MyZKClient(zk_hosts, auth_data=auth_data)

but, still has some NoAuth error when use TreeCache

zookeeper: 3.4.10