Hi,
Thank you for contacting support. With regards to your concern, it is not possible to request access to another Google My Business account via API. You could refer to the Location extension guide for more details on creating business locations using the Google My Business API and to link them to your ads using the AdWords API. Let us now if you need additional information.
Regards,
Nikisha Patel, Google Ads API Team
Hi,
You could ask them to refer to the steps to implement the location extensions from the guide shared in my previous response. The FeedService will create the location feed and the CustomerFeedService will associate the customer to the feed created. The AddGoogleMyBusinessLocationExtensions example shows how to add a feed that syncs feed items from a Google My Business (GMB) account and associate the feed with a customer. Could you please give this a try and let me know if it helps?
Regards,
Nikisha Patel, Google Ads API Team