Adding Snapchat icon to social bar

Maybe I’m tired – I’m certainly missing something. I’ve gone through this:

Adding the code:
Downloaded the snapchat fonts zip. from here: http://fontello.com
Uploaded in the enfold import/export area to Fontello fonts. (Successfully) It lists itself as “Font: fontello”

Added this code to my child theme functions.php
// Register new icon as a theme icon
function avia_add_custom_icon($icons) {
	$icons['icon_name']	 = array( 'font' =>'fontello', '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['Icon Label'] = 'icon_name';
	return $icons;
}
add_filter('avf_social_icons_options','avia_add_custom_social_icon', 10, 1);

But I still don’t see the icon live, I see the option for “Icon Label”(which I select and add a link to in the enfold_child edit area) in the enfold options (as I’ve not altered any code) should I be changing ‘icon_name’ to the name of the icon “icon-snapchat’ ? Thank you.