Board Thread:Support Requests - Getting Technical/@comment-25523075-20150712101022/@comment-1142365-20150712143011

You cannot edit PHP settings files on Wikia, nor can you upload your own (if that is what you are asking). No amount of questioning will lead someone to discover some hidden way of editing localSettings.php.

If you want to have a new usergroup added, you must contact Wikia. If Wikia will not add the usergroup for you, then you cannot have the usergroup.