After 3 months of work, today was the day to test a brand-new invoicing module for a hardware shop. We’re building a Blazor app to charge companies based on active users and license fees. By “we” means a team of contractors I’m part of. At the beginning of every month, the CEO creates invoices and charges cards manually. Zero automation. One by one. It takes him two or three days of work. Yes, in the 21st century. Today, the CEO decided to compare his manual process to the new module. On the first attempt to charge a card, we got...