More secure custom authentication solution (#126)

* Remove Nuxt Auth from the project, and switch to a custom solution

* Replace old testing code

* Remove warnings

* Add comments to hard to understand function calls in middleware

* Use arrow functions

plugins/auth.js

@@ -0,0 +1,3 @@
+export default ({ store }, inject) => {
+  inject('auth', store.state.auth)
+}