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Welcome back
Sign in with Telegram — same OAuth as the Android app. New accounts are created automatically. Phone OTP is available too.
Same OIDC flow as the Android app. In BotFather → Login Widget, add this site origin under Allowed URLs.
or phone
If this phone is already linked to the Telegram bot, we send a 6-digit code in Telegram. Otherwise we send an SMS code like the mobile app.