docs: def signing_base(self, request, consumer, token):
          """
          This method generates the OAuth signature. It's defined here to avoid circular imports.
          """
          sig = (
              escape(request.method),
              escape(OAuthHook.get_normalized_url(request.url)),
              escape(OAuthHook.get_normalized_parameters(request)),
          )
  
          key = '%s&' % escape(consumer.secret)
          if token is not None:
              key += escape(token.secret)
          raw = '&'.join(sig)
          return key, raw