Ensure calls to GSI are made on the main thread.

petea · web-flow · commit c57d715ff844 · 2022-12-09T10:43:19.000-08:00
diff --git a/Samples/Swift/DaysUntilBirthday/Shared/Services/GoogleSignInAuthenticator.swift b/Samples/Swift/DaysUntilBirthday/Shared/Services/GoogleSignInAuthenticator.swift
@@ -23,6 +23,7 @@ import AppKit
 #endif
 
 /// An observable class for authenticating via Google.
+@MainActor
 final class GoogleSignInAuthenticator {
   private var authViewModel: AuthenticationViewModel
 
