MVC 5 Identity and Google Auth Consent Screen - Minimal Permissions and No Email

Question

When you enter Stack-overflow, for example, you get the following consent screen:

1. In the settings of the screen of my consent, I must indicate my email address. How can I do this so that the email message is not displayed or the non-gmail email address is not displayed ?

2.My confirmation screen asks for email and basic information. I want him to only request email. Where in my MVC application can I configure Google authentication only to request permission for email?

EDIT : Regarding question 2, I found the answer:

var googleAuthOptions = new GoogleOAuth2AuthenticationOptions();
            googleAuthOptions.Scope.Add("openid email");