You did it! Sure, it might be four weeks overdue and late on a Friday, but you’ve finally finished deploying a long-awaited update to the web app. However, your celebrations are cut short as your phone vibrates off the table. Picking it up, you’re confronted with a developer’s worst nightmare. You’re getting flooded with messages that the login is no longer working. Was it your deployment? This is bad. Nobody can use the site if they can’t log in.
You rush back to your computer, hands shaky as you type in your password. You navigate to the production website, hit the “Sign in” button, and see the following error in the console: