AdWords API Sandboxメンテナンス

Google AdWords APIのオフィシャルブログAdWords API Blogより
Sandbox Maintenance - April 20

We will perform our regular refresh of the API Sandbox database on Friday, April 20 at 3 p.m. PDT. As a result, the Sandbox will be unavailable for a few hours.

The database refresh will erase all Sandbox user and account data. Therefore, you will need to first make a request without including a clientEmail header to create your five Sandbox client accounts.

4/20(金)にAPI Sandboxのデータベースをリフレッシュするため、数時間使用できなくなるとの事です。