Two-factor authentication

First, go to the "Security" section of your profile:

Click "Setup" next to the "Authenticator App" field:

Now you need to download the Google Authenticator app from the App Store or Google Play:

At the bottom of the screen, you can see an authentication QR code and below it a key that you must save in a safe place so that in case of device loss you still have the possibility to restore access to your account.

Open the app and click on the "+" icon in the lower-left corner. Then select "Scan a QR code", allow the app to use the camera, and point it at the QR code:

On your smartphone screen, you can see a 6-digit code that changes every 60 seconds.

Request a confirmation code on your phone number, enter it as well as the code from the authenticator, and click "confirm".

Done, two-factor authentication is set up!