Hi,
By default Google will request access to the email address, Github will
only request for the public profile information (sometimes that includes
the email address, sometimes it doesn't).
On Github you can ask for access to the email by specifying the scope
"user:email", more on scopes here
https://developer.github.com/v3/oauth/#scopes
Matías
--
Matías Aguirre
http://matiasaguirre.net/