I ran into that recently trying to connect a web shop we've built to an accounting platform. The web shop handles the entire checkout flow, but the owners also want a copy of the invoice stored in their accounting platform. The platform has an API. So our web shop can ping the accounting platform after an order is placed, and sent them a record of what was purchased? No. Because the API requires authorization. So the admin has to occasionally log into our website and hit a button to send invoices to the accounting platform. (At least we can send multiple invoices at once, so it doesn't require them to hit a button on each individual one.)
