docs: def get_authorization_url(self):
          """Get the authorization Url for the current client."""
          return self._format_url(
              OAUTH2_ROOT + 'authorize',
              query = {
                  'response_type': 'code',
                  'client_id': self.client.get('client_id', ''),
                  'redirect_uri': self.client.get('redirect_uri', '')
              })