Help with MyWarp!

Hi, I really need some help with this plugin called "MyWarp". What I need help with is the permission command that enables a group to set/create one private warp, and one public warp. I know it is something like "mywarp.limit..." but I dunno what goes after that :/ I want to limit the amount of warps the player gets to create but I just don't know the permission for it. Someone please tell me the perm that will do this. Help would be appreciated!