Custom login using Auth0

I'm working on integrating Auth0 into my Elgg site for custom login and looking for the best approach to take.  I currently have my site registered on Auth0 with a unique clientID and created some test PHP files in my web root to test my setup.  Of course my test files are just that and aren't integrated into my Elgg site.  I'm looking for a way to have my custom login page integrated in.... would this be considered a new plugin or can it be integrated without adding it as a plugin? I'm very new to Elgg so forgive my ignorance.. my timeline for getting a prototype up and running is pretty short so any help is appreciated. 

BTW.  I'm using Elgg 2.3.14

Thanks in advance.