chore: give the select fields option a better name, add it to guide

documentation/tutorials/getting-started-with-authentication.md

@@ -175,6 +175,8 @@ defmodule MyApp.Accounts.User do
   authentication do
     api MyApp.Accounts
 
+    select_for_senders [:email]
+
     strategies do
       password :password do
         identity_field :email

lib/ash_authentication/dsl.ex

@@ -104,7 +104,7 @@ defmodule AshAuthentication.Dsl do
             """,
             default: :get_by_subject
           ],
-          select_fields_for_senders: [
+          select_for_senders: [
             type: {:list, :atom},
             doc: """
             Ensures that fields required by your senders are selected when they are called

lib/ash_authentication/strategies/password/request_password_reset_preparation.ex

@@ -25,7 +25,7 @@ defmodule AshAuthentication.Strategy.Password.RequestPasswordResetPreparation do
 
       query
       |> Query.filter(ref(^identity_field) == ^identity)
-      |> Query.ensure_selected(Info.authentication_select_fields_for_senders(query.resource))
+      |> Query.ensure_selected(Info.authentication_select_for_senders(query.resource))
       |> Query.after_action(&after_action(&1, &2, strategy))
     else
       query