Making a protected layout to force users to sign in to view a route ( SvelteKit) : r/sveltejs
SvelteKit Authentication Using Cookies
Add Firebase authentication and protected routes to your SvelteKit Project : r/sveltejs
Handling authentication and authorization with JWT in SvelteKit - Okupter
GitHub - upperdo/backoffice-template: Clean Architecture Sveltekit Appwrite template include admin area, auth, protected routes, it use ShadCN-Svelte as base component library, include authorization, designed to be easy to maintain and very scalable.