With Login Verification, you can add one more level of security to your operator accounts.
Login verification can be found in the Userlike Dashboard under "Account" > "Organizations".
Select your organization from the list and enable Login Verification there.
Here you can select a verification interval of 1, 7, 15, 30, 60 or 90 days. After the selected period, a verification email will be sent to the operators' email addresses. Once this has been confirmed, the operator will be able to log in. Without confirmation, login won't be possible.