code: def _validate_required_settings(
  		self, application_id, application_config, required_settings
  	):
  		
  
  		for setting_key in required_settings:
  			if setting_key not in application_config.keys():
  				raise ImproperlyConfigured(
  					MISSING_SETTING.format(
  						application_id=application_id, setting=setting_key
  					)
  				)
docs: All required keys must be present