Only show nickname if not admin in a wordPress plugin

maybe-show-nickname.php

<?php 
/**
 * Only show nickname if not admin 
 * 
 * @since 1.0.0
 * 
 * TODO option to toggle
 */
function vertycal_maybe_show_nickname( $author )
{

	$author = wp_get_current_user();
	if( current_user_can('administrator') ) 
		{ $hrdscls = 'vrctl-hidden'; } 
	else { $hrdscls = 'vrtcl-block'; }
	ob_start();
	echo '<h4>' . esc_html__( 'Account: ', 'vertycal' ) 
	. '<span class="' . esc_attr( $hrdscls ) . '">' . $author->nickname . '</span>' . '</h4>';
		$output = ob_get_clean();
		return $output;
}
//usage (inline): echo vertycal_maybe_show_nickname( $author );