Sliced Invoices Stripe Gateway: show Stripe logo at bottom of payment form

functions.php

add_filter( 'sliced_stripe_gateway_image', 'sliced_stripe_gateway_image_custom' );
function sliced_stripe_gateway_image_custom() {
	return '<img src="' . plugins_url( '/sliced-invoices-stripe/accept-stripe.png' ) . '" alt="" />';
}