Or click your icon in the lefthand expanding menu, then click ‘Application Settings’.
You should see a pane open up in the main window that shows your name, and then underneath, it says ‘Edit your Account.’ Click that - it will bring you to your Nulab account.
From there, hit ‘Security’. You should see a section called ‘Two-factor Authentication’. Since you have not done anything with it yet, its status should say ‘Disabled’. Then, you’ll want to click ‘Start Two-Factor Authentication.’ You can select to initiate the verification code process either by text message or from a mobile app.