The Two-factor Authentication is an extra layer of security for your account, granting access only after inserting a unique 6-digit code, which is sent to your Authenticator app on your device. The 2FA is available on:
How enable 2FA?
In the Account submenu, click the 'Two-Factor Authentication' button.
2. Click on the 'Generate Secret' button.
3. Scan the QR code with your Authenticator app. Insert the 6-digit code generated and click the 'Enable 2FA' button.
4. Done! You will be prompted to insert the 6-digit code generated on your Authenticator app every time you log in.