Teramind supports 2FA apps like Google Authenticator, Authy, etc. You can enable/disable 2FA for admin users from the Settings > Security screen:
Click the Gear icon near the top-right corner of the dashboard.
Select the Security tab from the Settings screen.
Scroll down until you can see the Dashboard authentication section. Click the FORCE USERS TO LOG IN USING 2-FACTOR AUTHENTICATION button to enable/disable it.
Click the SAVE button when done. Next time any administrator logs in, they will be forced to enable 2FA before being given access to their dashboard.