message: Forbid null BasketItem IDs
  (fixes
diff: @@ -4,7 +4,8 @@ module.exports = (sequelize, { INTEGER }) => {
  id: {
  type: INTEGER,
  primaryKey: true,
  - autoIncrement: true
  + autoIncrement: true,
  + allowNull: false
  },
  quantity: INTEGER
  }
  