Hover over the profile icon on the top right of the screen and select the 'Settings' tab. From there you will have the option of 'Two-step authentication'.
From there you be directed to a new screen with steps on setting up multi-factor authentication.
The steps are:
Download your chosen Authenticator app on your device.
Submit the details below to see your unique barcode.
Once you're in the app, choose to scan a barcode and use your camera to scan the barcode below.
You'll see a number in your chosen Authenticator app. Enter this in Colladium.