2FA Authentication Master Backup

Hi

I am using 2FA to access my builder.

Quite a lot of app using 2FA offer a backup mode in case your phone is broken or lost. Does knack have a similar option please ? 

What if I can not use my phone for a while ? 

This situation is not listed in Knack support page, but it could be annoying to not be able to access to the builder in that case.

Thanks