title: Which Shopify app type choose for a multi store request
body: <p>I'm trying to do a system that can make request of orders from different Shopify Stores (differents clients).
  Each user of the system will have associated a Shopify Store. And I need to make a request to the store associated to bring data of the orders and products that have in his store.
  Reading the documentation I saw that shopify has 3 types of apps to interact with the api: Public, Custom and Private.
  Which of those should I use?</p>
  <p>Thanks!</p>