WP Author Page based on userextra filer

gistfile1.php

<?php // display all users with usermeta 'featured_author' checked 'yes'
					global $wpdb, $usermeta;
					$featured_authors = $wpdb->get_results("
						SELECT user.ID, user.user_nicename 
						FROM $wpdb->users user
						", OBJECT);
					// loop through authors
					foreach($featured_authors as $featured_author) {
						$curauthor = get_userdata( $featured_author->ID );
						// select featured authors
						$val = $usermeta->get($featured_author->ID, "featured_author", true);
						if ($val == 'Yes'){
							// featured authors attributes
							$name = $curauthor->display_name;
							endif;
 							{ ?>  
					<!-- Author Loop -->
					<?php  echo get_author_name($featured_author->ID)?>		
				<?php   }  }  } ?>