I would like my authentication hook to be able to modify the UI differently
depending on whether the user is trying to log in or create a new account. To
do this, I added a parameter to the abstract function
AuthPlugin::modifyUITemplate() for the login type. In SpecialUserlogin.php
around line 687 I added $this->mType as the second parameter in the
modifyUITemplate call. I think this would be useful for others modifying the UI
as well and would be useful if added to the code base.