Displaying an ACF list of users

You can use get_author_posts_url() or get_the_author_meta():

$values = get_field( 'editor' );
if ( $values ) {
  $editors = array();
  foreach ( $values as $value ) {
    $link = get_author_posts_url( $value['ID'] ); //get the url
    $nicename = $value['user_nicename'];
    $editors[] = sprintf( '<a href="https://wordpress.stackexchange.com/questions/106854/%s">%s</a>', $link, $nicename ); //create a link for each author
  }
  echo 'Edited by: ' . implode( ',', $editors );
}