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I Made Sync with User with MultiOTP, but I want to make the token OTP not used not to be effective. Example, OTP1:123456 I did not used this, when I got the OTP2:654231 I entered OTP1 and it was OK. I want OTP to be killed once the second OTP issued. I think this named Fall Back option in other products. how can I make this in MultiOTP ?