GOOGLE OpenID connect auth module

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References
Google specification : https://developers.google.com/accounts/docs/OAuth2Login
Google client library : https://github.com/google/google-api-php-client
Scopes : https://developers.google.com/+/api/oauth#login-scopes
openid connect specification : http://openid.net/specs/openid-connect-core-1_0.html

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Register my application on Google  

https://code.google.com/apis/console

Create a project to get : client_id & client_secret
Add it into the file :/config/authsources.php

'google' => array(
		'authgoogleOIDC:GoogleOIDC',
		'key' =>'...apps.googleusercontent.com',
		'secret' => '.....',
),

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Module based on Google client library :
https://github.com/google/google-api-php-client


returned Google attributes :
log:
Google Response: {
 "kind": "plus#personOpenIdConnect",
 "gender": "male",
 "sub": "...",
 "name": ".....",
 "given_name": "Sylvain",
 "family_name": "Medard",
 "profile": "https://plus.google.com/...",
 "picture": "https://l...",
 "email": "...",
 "email_verified": "true",
 "locale": "fr"
}