AdWords API v201806 will be
sunset on April 2, 2019.
After this date, all v201806 API requests will begin to fail. You have the option of migrating directly to
Google Ads API v1, which is ready for your production systems. If you’re not ready for the v1 migration, then please migrate to v201809 prior to April 2, 2019 to ensure your API access is unaffected.
We've prepared various resources to help you with the migration:
If you have questions while you’re upgrading, please reach out to us on the
forum.
Nadine Sundquist, Google Ads API Team