问题 I get credentials using code static string[] Scopes = { "https://www.googleapis.com/auth/userinfo.email" }; private static UserCredential GenerateCredential() { UserCredential credential; using (var stream = new FileStream("credentials.json", FileMode.Open, FileAccess.Read)) { // The file token.json stores the user's access and refresh tokens, and is created // automatically when the authorization flow completes for the first time. string credPath = "token.json"; credential =