Ensure top-level security for your account with Two-Factor Authentication. When enabled, each team member is required to enter both a password and an authentication code either from an authentication app or SMS verification, to sign in to an account. The authentication code will be required only from users that will connect with email and password.
Go to your profile icon (bottom left) > Profile
Click on the Password tab
Select Enable two factor authentication
You’ll be sent a code to your registered email address, enter this code in the Enter your verification code box
Click Save
Please watch the video below for additional reference.

