Creating item should return 201 on success, 500 for generic error Retrieving items: 200 when success, 404 when not finding an specific item, 400 if there is a bad request, 500 for generic error Deleting: 200 on success, 400 on bad request, 404 or 200 on not finding, 500 for generic error Updating: 200 on success, 404 on not found, 400 for bad request, 500 for generic error