title: Google - "Migrate to the new Google Identity Services library as soon as possible". Do we need to remove our use of google-api-php-client?
body: <p>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.'</p>
  <p>This is a surprise, as we recently upgraded to using only the <a href="https://github.com/googleapis/google-api-php-client" rel="nofollow noreferrer">https://github.com/googleapis/google-api-php-client</a> library for logging the user in. I have no mention of the old API (gapi) in my source code.</p>
  <p>I'm using the oauth endpoints directly to query the API.</p>
  <p>I'm worried that I will need to stop using the PHP library now as well. Can anybody please offer some advice?</p>