How Do You Create An Account On Roblox Wiki

If you want to join "the offical Roblox wiki"(roblox.wikia.com) go to http://roblox.wikia.com/index.php?title=Special:Signup&returnto=Roblox_Wiki&type=signup but if you want to sign up for roblox game wiki (wiki.roblox.com) you have to be an Admin