See this page for details on how ADC 2FA works.
Check out the description at the link and I definitely recommend using it.
Now, I have actually found that Alarm.com has recently added an option for dealers to put individual accounts on an exemption list, which should stop 2FA setup reminders. If you absolutely don’t want to use 2FA we can add you to the exemption list, just send us a private message requesting that.
(But, generally, don’t do that. 2FA is an effective security measure.)