As of late, google play is "reviewing" new apps that were published to google play.
My app requires the reviewer to have a demo account, otherwise the user cannot go past the initial screen.
Where is the place that I provide the reviewer with the demo account?
Actually you could provide extra data for google play by follow the instructions bellow:
Actually in now days google will reject apps that don't fill the credentials for testing purposes. See the rejection from google play when you don't inform the demo credentials.