EelHelper for IfAuthenticatedViewHelper

[mhsdesign]

I was asked how to use this logic in Fusion: https://github.com/sandstorm/UserManagement#checking-for-a-logged-in-user-in-your-templates

From the IfAuthenticatedViewHelper

So i made an easy Eel helper - would it make sense to include it in this package? https://gist.github.com/mhsdesign/35fbd4e2f6370cceae9ebf8da8e4f7b6