Shopify.Client.request

You're seeing just the callback request, go back to Shopify.Client module for more information.
Link to this callback

request(request, client_opts)

Specs

request(request :: Shopify.Request.t(), client_opts :: term()) ::
  {:ok,
   %{
     body: binary(),
     headers: [{binary(), binary()}],
     status_code: pos_integer()
   }}
  | {:error, reason :: binary()}