On behalf of the Google Analytics team I would like to announce the following updates to the Google Analytics Admin API.
update_mask field is required for all Update operations.
country_code field renamed to region_code in Account.
url_query_parameter field renamed to uri_query_parameter in EnhancedMeasurementSettings.
parent field removed from GoogleAdsLink.
Please make sure your code is updated to use the latest version of the API client libraries.
The Google Analytics Team