https://t.me/ChallenquizBot
(source: https://github.com/PomeGroup/challen-quiz/commit/fa9da2182270a69d83a900158091d1ce1233d24e)

Challenquiz a competitive web3 mini app in Telegram and TON ecosystem

I'm unable to login with Telegram. OAuth shouldn't be used in the mini app IMO as there are other methods of authentication.