thanks for the reply :D

here are some fresh screenshots with my own account https://imgur.com/a/9B2aKJX

if you sees 'This app isn't verified' or something (not sure the actual message, I'm not in an english-speaking country), unfortunately I can't fix it for now; for certain google oauth scopes that are more sensitive they require the app to own the domain, but I use heroku to deploy my prototype and I obviously don't own the domain :(. I may fix it in the near future but I'd like to implement new features first.