It&#x27;s in this blog post (search for 305): <a href="https:&#x2F;&#x2F;design.google.com&#x2F;articles&#x2F;evolving-the-google-identity&#x2F;" rel="nofollow">https:&#x2F;&#x2F;design.google.com&#x2F;articles&#x2F;evolving-the-google-ident...</a>