code: def set(self, key, value):
          
          url = self._url('{}'.format(key))
          body = {'value': value}
          return self.client.put(url, data=body)
docs: Sets the rules config for a given key.
  
          Args:
              key (str): rules config key to set
  
              value (str): value to set for the rules config key
  
          See: https://auth0.com/docs/api/management/v2#!/Rules_Configs/put_rules_configs_by_key