Google+ API - get User ID by e-mail?
It's just a few moments Google published its API for Google+ social network

But how can I get numeric ID of user ? Or am I forced to use oAuth?

I know it's written there in URL when you access your/foreign profile page, but how to do it programmaticaly with

info:  
http://developers.google.com/+/api/latest/people/get
http://developers.google.com/+/api/oauth
Google+ API - get User ID by e-mail?
===

It's just a few moments Google published its API for Google+ social network

But how can I get numeric ID of user ? Or am I forced to use oAuth?

I know it's written there in URL when you access your/foreign profile page, but how to do it programmaticaly with

info:  
http://developers.google.com/+/api/latest/people/get
http://developers.google.com/+/api/oauth