Add custom social icons to social profiles

Hello,

I was trying to add a custom social profile with a icon from a uploaded font.
I used this code as described here: https://kriesi.at/support/topic/how-to-add-a-few-more-social-profiles-into-the-enfold-child/
Unfortunatly it didnt work. Could you please give me advise?

	// Register new icon as a theme icon
function avia_add_custom_icon($icons) {
	$icons['discord'] = array( 'font' =>'additionalcustomicons', 'icon' => 'ue800');
	return $icons;
}
add_filter('avf_default_icons','avia_add_custom_icon', 10, 1);

// Add new icon as an option for social icons
function avia_add_custom_social_icon($icons) {
	$icons['Discord'] = 'discord';
	return $icons;
}
add_filter('avf_social_icons_options','avia_add_custom_social_icon', 10, 1);