#commands ```bash npm run build:watch ``` ```bash firebase emulators:start --only functions ``` ```bash subscribe({'author_account_id': 'acct_1KnUx5B24VIFkG7u','customer_id': 'acct_1KnUx5B24VIFkG7u','price': 'price_1L1ImpB24VIFkG7uvHUa0Asi',}) ```