HogwarpServers

Hello, I'm looking for a way to generate a new promotion code when a user types a command in discord, so I will be able to add the discount code to a database and tie it to their username. I can't find any documentation that would allow me to do this, and I don't know how to create my own API endpoint to do this. If anyone has a link to documentation, or this has been done before somewhere else. In my head it seems like such a simple task, but I can't find anywhere that supports this idea?