GOOGLE_LOGIN_SCOPES => GOOGLE_LOGIN_CLIENT_SCOPES; be the same with the ...

the doc and source didn't match

doc:
Configuration
Google API
GOOGLE_LOGIN_CLIENT_ID	Client ID (create one at https://code.google.com/apis/console)
GOOGLE_LOGIN_CLIENT_SECRET	Client Secret
GOOGLE_LOGIN_CLIENT_SCOPES	Default scopes
GOOGLE_LOGIN_REDIRECT_URI	Default redirect URI	

source:
return self.app.config.get('GOOGLE_LOGIN_SCOPES', '')