I am using php LightOpenID for implementing google signIn, and I am having no problem in that. But recently I came to know that google deprecated OpenID 2.0 and soon will stop supporting it . So they are suggesting to migrate form OpenId to OAuth 2.0 login .
https://developers.google.com/+/api/auth-migration#timetable I have gone tghrough thsi documentation , but understood a little . I am confused as how to adapt this changes, can I use existing php LightOpenID ? or what is the actual process of migrating without affecting old existing system . Tried googling but none were helpful . Please suggest how to achieve this , and what path should I take ? Any references etc will be helpful