club_users

// WP_User_Query arguments
$args = array(
	'search'         => '$s',
	'search_columns' => array( 'user_login', 'user_nicename', 'display_name' ),
);

// The User Query
$user_query = new WP_User_Query( $args );

// The User Loop
if ( ! empty( $user_query->results ) ) {
	foreach ( $user_query->results as $user ) {
		// do something
	}
} else {
	// no users found
}