public_yoast_user_contactmethods.php

<?php
add_filter( 'user_contactmethods', 'limecuda_public_yoast_contactmethods', 20, 1 );
/**
 * If you're using the Yoast SEO plugin, there are contact methods available on user profiles
 * to add Facebook, Twitter, and Google+ information for the user.
 *
 * However, with the way they are added, they're only available within the admin. So,
 * if you're trying to create an author template which automatically pulls all the registered
 * contact methods, these Yoast methods will not be returned.
 *
 * This function will make these contact methods available to wp_get_user_contact_methods().
 *
 * @param     array $methods The registered contact methods.
 */
function limecuda_public_yoast_contactmethods( $methods ) {

	if ( ! function_exists( 'wpseo_init' ) )
		return $methods;

	$methods['googleplus'] = __( 'Google+', 'wordpress-seo' );
	$methods['twitter']    = __( 'Twitter username (without @)', 'wordpress-seo' );
	$methods['facebook']   = __( 'Facebook profile URL', 'wordpress-seo' );

	return $methods;

}