What is 2FA?
Described by securenvoy as:
Two Factor Authentication, also known as 2FA, two step verification or TFA (as an acronym), is an extra layer of security that is known as “multi factor authentication” that requires not only a password and username but also something that only, and only, that user has on them, i.e. a piece of information only they should know or have immediately to hand - such as a physical token.
This unique Authentication Code, usually provided by Google Authenticator, adds an extra layer of security to your account on GNEISS.
Since this password is unique and usually non-replicable make sure not to lose the 2FA Key that you receive and to store it in a safe place.