OTP verification before signing up

Currently, in Supabase's signInWithOtp function, if shouldCreateUser is set to true, an account is created even before the OTP is verified. I think this is very inefficient. I do not want dummy accounts to be created. Only emails that have passed OTP verification should result in account creation. However, it seems that Supabase does not support this.

Does anyone have a good solution for this?