oAuth.AuthUrl = "https://accounts.google.com/o/oauth2/auth";
oAuth.TokenUrl = "https://accounts.google.com/o/oauth2/token";
oAuth.RedirectUrl = "http://localhost";
oAuth.ClientID = "421475025220-6khpgoldbdsi60fegvjdqk2bk4v19ss2.apps.googleusercontent.com";
oAuth.ClientSecret = "_4HJyAVUmH_iVrPB8pOJXjR1";
oAuth.Scope = "https://mail.google.com/";

var authorizationToken = oAuth.GetAuthorization();