How to create an atomic validation for the amount on AshMoney?

    attribute :amount, :money do
      constraints storage_type: :money_with_currency
      allow_nil? false
    end

    attribute :amount, :money do
      constraints storage_type: :money_with_currency
      allow_nil? false
    end

  @impl true
  def validate(changeset = %Ash.Changeset{}, _opts, _context) do
    amount = Ash.Changeset.get_attribute(changeset, :amount)

    if Decimal.eq?(amount.amount, Decimal.new(0)) do
      {:error, field: :amount, message: "can't be zero"}
    else
      :ok
    end
  end

  @impl true
  def validate(changeset = %Ash.Changeset{}, _opts, _context) do
    amount = Ash.Changeset.get_attribute(changeset, :amount)

    if Decimal.eq?(amount.amount, Decimal.new(0)) do
      {:error, field: :amount, message: "can't be zero"}
    else
      :ok
    end
  end