i need help in order to register in longju3

I read the post with the guide to register and i had understand all of the parts, except the id pass.What number i have to put there?I saw the guide and it write XXX and something else next to it.

So, can anybody explain me in english what i have to write over there?

(aswers only in english pls, I am from Greece )

I think you won't get any help to longju3 here, beacuse nearly nobody is playing longju3 anymore!

Sorry! :(