You can only exchange items with your Co-Op’s members. Tap Request products to request products, select the goods you need in the pop-up window, and tap Request. The amount you can ask for depends on the product type. You can make requests once every 8 hours.
Remember that level of your fellow Co-Op members will affect feasibility of your request, because they may not be able to give you what you’re looking for. You can chat with Co-Op members at first, it will help to figure out which products you can ask for. Choose wisely, you can’t change your request. Moreover, you have to wait eight hours before making a new one.