I received an email from Google stating that 'One or more of your web applications uses the legacy Google Sign-In JavaScript library. Please migrate your project(s) to the new Google Identity Services SDK before March 31, 2023.'
This is a surprise, as we recently upgraded to using only the https://github.com/googleapis/google-api-php-client library for logging the user in. I have no mention of the old API (gapi) in my source code.
I'm using the oauth endpoints directly to query the API.
I'm worried that I will need to stop using the PHP library now as well. Can anybody please offer some advice?