create a resource called listing and our listing would have a basic attributes of title description price and when it expires and it's a simple resource we can have a list of them and just serve the all the listings in the database but then we get additional requirement that says hey can you please please include uh seller information like his name and his contact information so uh again a simple so simple approach would be we just modified the existing listing uh with the title description pricing expires on and we add a seller name