Restrict access only to admin users

Hi, great plugin!

Is there any hook I could use to somehow restrict access to the API docs pages only to administrators? for time reasons I added the following directly on the simple template file:

<?php 
	/* Template Name: Restricted to Admin only */
	if ( !current_user_can('administrator')) {
		get_template_part('error');
		exit(0);
	}
	?>

But I know I shouldn’t modify the plugin directly. Is there anything else I could do?
Thank you!