<?php
while ( have_posts() ) : the_post();
$author_id=$post->post_author;
//Avatar image
echo get_avatar( 32 );
//Author “Nick Name”
echo the_author_meta( ‘user_nicename’ , $author_id );
echo get_userdata($author_id)->nickname;
//Author “Display Name”
echo the_author_meta( ‘display_name’ , $author_id );
//Author “E-Mail address”
echo the_author_meta( ‘user_email’, $author_id );
//Author user loin
echo get_userdata($author_id)->user_login;