Google Ads API v15 will sunset  on September 25, 2024. After this date, all v15 API requests will begin to fail.  Migrate to a newer version  prior to September 25, 2024 to ensure your API access is unaffected.Google Cloud Console :
  Open the Dashboard  page (found under APIs & Services ) in the Google Cloud Console. 
  Click Google Ads API  in the table. 
  On the METRICS  subtab, you should see your recent requests plotted on each graph. At the bottom of the page, the Methods  table shows which methods you’ve sent requests to. The method name includes a Google Ads API version, a service, and a method name, such as google.ads.googleads.v15.services.GoogleAdsService.Mutate. In this way, you can see all versions that you’ve used recently. 
  (Optional) Click the time frame at the top right of the page if you need to change it. 
 
If you have questions while you’re upgrading, reach out to us on the forum  or at googleadsapi-support@google.com .