woocommerce_product_get_price equals 0 in cart

Hi, I am trying to display a different price for logged in users but I cannot get it to work on the cart page and checkout. Any idea what I'm missing here?

Here's my code;

add_action( 'woocommerce_product_get_price', 'reseller_price', 10, 2 );

function reseller_price( $price ) {
if( is_user_logged_in() && ! is_admin() ){
$af_price = get_field( "af-pris" );

return $af_price;
}
return $price;
}