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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def authorization_url(self, **kwargs):
 """Generates an authorization URL. This is the first step in the OAuth 2.0 Authorization Flow. The user's browser should be redirected to the returned URL. This method calls :meth:`requests_oauthlib.OAuth2Session.authorization_url` and specifies the client configuration's authorization URI (usually Google's authorization server) and specifies that "offline" access is desired. This is required in order to obtain a refresh token. Args: kwargs: Additional arguments passed through to :meth:`requests_oauthlib.OAuth2Session.authorization_url` Returns: Tuple[str, str]: The generated authorization URL and state. The user must visit the URL to complete the flow. The state is used when completing the flow to verify that the request originated from your application. If your application is using a different :class:`Flow` instance to obtain the token, you will need to specify the ``state`` when constructing the :class:`Flow`. """

        kwargs.setdefault('access_type', 'offline')
        url, state = self.oauth2session.authorization_url(
            self.client_config['auth_uri'], **kwargs)

        return url, state