OAuth google does not open browser when using production key

[piaomz]

My iOS app is using google account for login and in this starter repo, I try to use pk_live_xxxxx key to let it happen. But the browser does not show up. The console have error: OAuth error [Error]. I have added my redirect urls in the dashboard with myapp://oauth-callback. The dev key can pop up the browser with google login. But the production key work on the Web application very well. What did I missed?