Sage to Shopify Integration

We'd like you to produce a PHP service class utilizing some of the Sage 300 ERP API functionality. It would need to have methods to provide each of the following functionalities: API Authentication Read all products/items Read a single product/item, fetch it by SKU If fetching items by SKU isn’t possible, then we need it to be able to fetch all items instead. Read item stock levels Create a new order Create a new order return Retrieve order returns It would also need to work such that creating an order or an order return updates the stock levels of each item as appropriate - this may be built into sage already. The service will be used in a Laravel app, and will need to work with product and order data pulled from the Shopify ecommerce platform.