Guides or advice for migrating to Ash?

defmodule Iterup.Repo.Migrations.CreateAccounts do
  use Ecto.Migration

  def change do
    create table(:accounts, primary_key: false) do
      add :id, :binary_id, primary_key: true
      add :name, :string
      add :slug, :string

      timestamps()
    end

    create unique_index(:accounts, [:slug])
  end
end

defmodule Iterup.Repo.Migrations.MigrateResources1 do
  @moduledoc """
  Updates resources based on their most recent snapshots.

  This file was autogenerated with `mix ash_postgres.generate_migrations`
  """

  use Ecto.Migration

  def up do
    create table(:accounts, primary_key: false) do
      add :id, :uuid, null: false, default: fragment("uuid_generate_v4()"), primary_key: true
      add :name, :text, null: false
      add :slug, :text, null: false
      add :inserted_at, :utc_datetime_usec, null: false, default: fragment("now()")
      add :updated_at, :utc_datetime_usec, null: false, default: fragment("now()")
    end
  end

  def down do
    drop table(:accounts)
  end
end