Adding custom authentication to my existing application using azure, ionic, and auth0

I created an ionic application using azure as the backend. They don't offer custom authentication and I can't seem to get it to work. However it's well documented. I need someone to add authentication to my application so that when a user logs in they are authenticated and allowed access through my database. You will be using JWT tokens and auth0. I can work with you on team viewer, I am a decent programmer but stuck here because I have never worked like this with server code.