Google has started sending notifications to those affected by it error in Google + API which was disclosed in December 2018. The notification contains details about which profile data was exposed, and which applications they had access to them.
On 10 December 2018, Google announced that a bug in the Google + API allowed applications to allow users to view private data on their profile that they normally should not have access to.
According to the company's announcement, this error affected over 50 millions of users.
Starting last week, Google+ users affected by the bug began receiving notifications from Google indicating which profile fields were exposed and which apps had access to them. The exposed fields as well as the applications are in an attachment archive called app_details.csv, in accordance with bleepingcomputer.
The company has already decided to terminate the Google + social service in August of 2019 due to its non-interest from users but also one previous error in the API that leaked personal information from 500.000 Google+ accounts.
With the disclosure of the second API bug in December, Google decided to shut down the service against "headaches, headaches." The service will cease to operate in April 2019 while all the functions of the API will be disabled by March 2019.