Cashier question

I have Cashier all setup and working, but I'm using the protected $cardUpFront = false; property which involves adding this $user->trial_ends_at = Carbon::now()->addDays(14); to the user model. So in effect there's no Stripe account until the customer enters their card details.

I want to be able to show invoices, but need someway to check that invoices exist on the customer account or else show nothing.

I have tried the following:

$inv = Auth::user();
$invoices = $inv->invoices();

So this works if there's an active stripe account, but then shows errors if there's nothing, what would be the best way to check?

I also tried in my view:

@if(count($invoices))
   // Rest of code
@endif

But still doesn't work as expected. Anyone have any suggestions?