Ways to do middleware route filter

[MaxTechnics]

I'm working on an api that has a bunch of routes that require user permissions. Up to this point i've done this check in each route (so it has a bunch of duplicate code). I want to move this to a middleware, however following the documentation (https://nitro.build/guide/routing#request-filtering), i'm wondering whether there's a better way to define routes that need the middleware?

Is there a custom props feature in nitro? Or what would be a good way to go about this?
Thank you in advance!