title: Deprecation of https://www.googleapis.com/plus/v1/people/me and how properly to migrate
body: <p>Recently <strong>Google plus</strong> is pending for shutdown, which also shutdown some <strong>Google Plus API</strong> including this one <code>https://www.googleapis.com/plus/v1/people/me</code> which our service is actively using.</p>
  
  <p>That above API was used in one of our legacy login library, which I can't even find the source for it. Hence I am now trying to patch it myself.</p>
  
  <p>Reading the migrate <a href="https://developers.google.com/identity/sign-in/web/quick-migration-guide" rel="noreferrer">guide</a> from Google, it doens't tell much in terms of how to change the url.</p>
  
  <p>Referencing some open source library like <a href="https://github.com/pac4j/pac4j/blob/pac4j-3.5.0/pac4j-oauth/src/main/java/org/pac4j/oauth/profile/google2/Google2ProfileDefinition.java" rel="noreferrer">1</a>, <a href="https://github.com/hybridauth/hybridauth/issues/1024" rel="noreferrer">2</a>. I have come up with the fix of replacing the url <code>https://www.googleapis.com/plus/v1/people/me</code> with <code>https://www.googleapis.com/oauth2/v3/userinfo</code>, which works but <code>oauth2/v3/userinfo</code> lacks documentation, so I am pretty worry that <code>oauth2/v3/userinfo</code> is not intended to be used like the above.</p>
  
  <p>So my question is:</p>
  
  <ol>
  <li>Is my solution: change <code>https://www.googleapis.com/plus/v1/people/me</code> with <code>https://www.googleapis.com/oauth2/v3/userinfo</code> an intended migration, if not then how can I migrate out of Google Plus API?</li>
  <li>Any documentation on <code>https://www.googleapis.com/oauth2/v3/userinfo</code>? The closest I can find is <a href="https://developers.google.com/identity/protocols/OpenIDConnect#discovery" rel="noreferrer">this</a>, which seems more like an brief intro then a documentation.</li>
  </ol>