In any language, TOTP is just a couple of dozen lines of code even if there isn’t already a library — and there is probably already a library. You don’t have to store temporary SMS codes in the database, you don’t have to worry about phishing, you don’t have to worry about SIM swapping, and you don’t have to sign up for some paid SMS API like Twilio. It’s more secure and it’s trivial to implement — so implement it already! Please!
