delete https://{server}/api/v2.1/org//admin/users//two-factor-auth/
If a user in your team has lost their phone or deleted the authenticator App by accident, they cannot log in to SeaTable anymore if 2FA is enabled for them. In this case, you as the team administrator can disable 2FA for them.
Again, this is to be distinguished from the request Enforce 2FA for A User in Team when you use force_2fa = 0, which only cancels the enforcement of 2FA but doesn't necessarily disable it for them.