app/src/app.d.ts

// See https://kit.svelte.dev/docs/types#app
// for information about these interfaces
declare global {
	namespace App {
		// interface Error {}
		interface Locals {
			user: SessionUserInfo,
			project: SessionProjectInfo
		}
		// interface PageData {}
		// interface PageState {}
		// interface Platform {}
	}

	interface SessionUserInfo {
		id: string,
		username: string,
		email: string,
		account_type: string
	}

	interface SessionProjectInfo {
		id: string,
		project_name: string
	}
}

export {};