I'm trying to set up a per-route authentication guard with vue-router in Quasar, and I cannot figure out how to get `isAuthentication` working. I do not know how to reference Nhost. The documentation speaks of setting up a common `router.beforeEach`, but with Quasar, the function looses references to Nhost, so I cannot ask it for authentication either. Are there any examples of per-route authentication with Quasar/vue-router?