Fix typo reported in forum

source/web/authenticate.txt

@@ -224,7 +224,7 @@ is a Google SDK that lets users sign up to or log in to a website with one click
           });
           // Callback used in `data-callback` to handle Google's response and log user into App Services
           function handleCredentialsResponse(response) {
-            const credentials = Realm.Credentials.google({ id_token: response.credential });
+            const credentials = Realm.Credentials.google({ idToken: response.credential });
             app
               .logIn(credentials)
               .then((user) => alert(`Logged in with id: ${user.id}`));