diff --git a/google_signin/lib/main.dart b/google_signin/lib/main.dart
index 858a9fa..03b4fff 100644
--- a/google_signin/lib/main.dart
+++ b/google_signin/lib/main.dart
@@ -41,12 +41,11 @@ class AppState extends State<App> {
     FirebaseAuth _auth = FirebaseAuth.instance;
     try {
       googleSignIn = GoogleSignIn();
-      GoogleSignInAccount googleUser = await googleSignIn.signIn();
-      final GoogleSignInAuthentication googleAuth =
-      await googleUser.authentication;
+      GoogleSignInAccount googleSignInAccount = await googleSignIn.signIn();
+      final GoogleSignInAuthentication gauth = await googleSignInAccount.authentication;
       final AuthCredential credential = GoogleAuthProvider.getCredential(
-        accessToken: googleAuth.accessToken,
-        idToken: googleAuth.idToken,
+        accessToken: gauth.accessToken,
+        idToken: gauth.idToken,
       );
       final AuthResult authRes = await _auth.signInWithCredential(credential);
       final FirebaseUser user = authRes.user;