Calculation for loading user records from the configured user resource.

This provides a clean way to load users without compile-time dependencies. The consuming application configures which user resource to use:

config :ash_dispatch,
  user_resource: MyApp.Accounts.User,
  user_domain: MyApp.Accounts

Usage

In queries:

DeliveryReceipt
|> Ash.Query.load(:user)
|> Ash.read!()

The calculation will batch-load all users efficiently.