})

        r = requests.get('https://api.github.com/user', auth=auth)
        # => <Response [200]>
        r = requests.get('https://example.com/some/path', auth=auth)
        # => <Response [200]>

        s = requests.Session()
        s.auth = auth
        r = s.get('https://api.github.com/user')
        # => <Response [200]>

    .. warning::

        :class:`requests.auth.HTTPDigestAuth` is not yet thread-safe. If you
        use :class:`AuthHandler` across multiple threads you should
        instantiate a new AuthHandler for each thread with a new
        HTTPDigestAuth instance for each thread.

    c