Start by navigating to your profile at the bottom of the screen.
On a mobile phone, you must tap the gear icon at the bottom of the screen.
Click on the Settings tab.
Under Security, select Two-Factor Authentication.
By default, your two-factor authentication is sent by email. If you want to receive it by SMS, select this option.
If you have no phone number associated with your account, select Add Phone Number.
Enter your number and select Create.
You will then receive a 6-digit confirmation code. Enter it in the appropriate field, then click Validate.
