(Request) G3mTD custom map trying to find some secret code generator

Hi , i tried all day lookin in map for some code generator to get shells in game wich u can buy ability from shop , so the creator made some link to ebay wich you can buy those shells with real money and after you buy he send you a code wich you just type in game and you get the shells..I unpacked all the map and i looked in all scripts i think the code is
function jiyun_cd(keys)
-- DeepPrintTable(keys)
end
located in addon_game_mode.lua
so i need help get the generator or the codes for the shells.ty
PS: i open the map with GCFScape and .lua files with Notepad++
the map *****. io/m3087 just remove the space
i tried attach but dont work