How can i let Google bot acces my website?

I have recently had a huge attack so i added to WAF only one rule
“If not from my Country, then everything else JS Challenge.”
So this means that only the people from my country can acces the website, all other people from the world will have to complete a challenge.
I have made this for public traffic, but now i think there might be the bots involved too.

So i want to allow acces to my website for Google bot. How do i do this?