Implementing Oauth2 login, Fatal error: Class 'Google_Service' not found

Question

I am updating my website\'s login system from LightOpenID to Google\'s Oauth 2.0.

When I require the Client.php and the Service/Oauth2.php I get an error

Answer 1

To this version https://github.com/google/google-api-php-client this is a posible solution

set_include_path("google-api-php-client/src/" . PATH_SEPARATOR . get_include_path());

//.....

require_once 'Google/Service.php';
//.....