Specification of the..
error() :: {:error, %Shopify.Response{code: term, data: term}}
request() :: %Shopify.Request{body: term, full_url: term, headers: term, path: term, resource: term, type: term}
success() :: {:ok, %Shopify.Response{code: term, data: term}}
delete(request) :: success | error
get(request) :: success | error
post(request) :: success | error
put(request) :: success | error