Migrating from Cashier
Your billables already carry stripe_id — the very column this package reads. So after
installing, run one command to adopt every subscription you already have:
php artisan billing:sync
It pulls each existing customer's live subscription from Stripe and writes the local row and tier column.
Without it your paying customers stay invisible to the package until their next customer.subscription.*
webhook — which, on an untouched annual plan, could be a year away.