docs: def construct_oauth_url(self):
          """ Constructs verifier OAuth URL """
          response = self._requester(requests.head, 
                                     "{0}://{1}/".format(self.protocol, self.client.server),
                                     allow_redirects=False
                                    )
          if response.is_redirect:
              server = response.headers['location']
          else:
              server = response.url
  
          path = "oauth/authorize?oauth_token={token}".format(
              token=self.store["oauth-request-token"]
          )
          return "{server}{path}".format(
              server=server,
              path=path
          )