I don't linking authentication.
I have used this plugin "JSON API" to do a front-end for the blog using nodebb pages.
We created routes to get category and posts, like this: http://petiko.com.br/articles
This is a startup project focused on brazilian pet segment. We will work to create a market place, and a platform of content recomendation to make learning fun. Users can register and inform yours pet's, and we recomend content according your interests and provide threads of discussions about that, besides thematic quiz games. Some actions have gamification strategies and in future user can change your points for prizes.
Sorry for my bad english pitch =P