https://supertokens.com/docs/passwordless/common-customizations/sign-in-and-up/change-otp-format#:~:text=By%20default%2C%20the%20generated%20OTP,by%20providing%20the%20getCustomUserInputCode%20function. I am checking this documentation Could not find how to change length of otp from 6 to 4

just return an otp that has 6 chars.

I want 4 digit otp but

thenh return otp of length 4 from the func