must login with G+, use normal google?

[wenever]

some people don't wanna g+

[MichaelArnoldOwens]

there exists this scope:
https://www.googleapis.com/auth/userinfo.email

but it is deprecated
src: https://developers.google.com/+/web/api/rest/oauth#email

https://sites.google.com/site/oauthgoog/Home/emaildisplayscope

http://stackoverflow.com/questions/14107563/get-oauth-access-to-gmail