CRUD Operations for Worlds/Users in Firebase Database

[owensmallwood]

Need to be able to CRUD(create, read, update, destroy) the VR world json data in the Firebase Realtime Database. I've already added a POST route to \uploadWorld\:id for creating the world. My plan is to add the other three and try to integrate this with @Wynston 's auth stuff. I expect the routes to be done by Friday, the integration with auth depends on how smoothly things go.

Do CRUD stuff for users to ^^^. Forgot that. Probably just Create a user for now.