Clarify session instantiation in README
@@ -59,7 +59,7 @@ ShopifyAPI uses ActiveResource to communicate with the REST web service. ActiveR
2. For a private App you just need to set the base site url as follows:
```ruby
- shop_url = "https://#{API_KEY}:#{PASSWORD}@SHOP_NAME.myshopify.com/admin"
+ shop_url = "https://#{API_KEY}:#{PASSWORD}@#{SHOP_NAME}.myshopify.com/admin"
ShopifyAPI::Base.site = shop_url
```