'Forcefully override a setting set by zappa_settings (for the current stage only)
:param key: settings key
:param val: value'

def override_stage_config_setting(self, key, val):

    self._stage_config_overrides = getattr(self, u'_stage_config_overrides', {})
    self._stage_config_overrides.setdefault(self.api_stage, {})[key] = val
