code: def get_authorize_url(self, redirect_uri='', **kw):
          '''
          return the authorization url that the user should be redirected to.
          '''
          return self._mixin.get_authorize_url(redirect_uri or self._mixin._redirect_uri, **kwf get_authorize_url(self, redirect_uri='', **kw):
          '''
          return the authorization url that the user should be redirected to.
          '''
          return self._mixin.get_authorize_url(redirect_uri or self._mixin._redirect_uri, **kw)
docs: return the authorization url that the user should be redirected to.