code: def override_stage_config_setting(self, key, val):
          
          self._stage_config_overrides = getattr(self, '_stage_config_overrides', {})
          self._stage_config_overrides.setdefault(self.api_stage, {})[key] = val
docs: Forcefully override a setting set by zappa_settings (for the current stage only)
          :param key: settings key
          :param val: value