example.php

<?php

  echo $this->Html->link(
      'VISUALIZZA', Cake\Routing\Router::url([
          'plugin' => false,
          'controller' => 'Users',
          'action' => 'login',
          '?' => ['token' => $user->token, 'r' => 'scheda', '/' => $agentCode],
          '_full' => true,
          ], ['escape' => false]), [
      'target' => '_blank'
      ]
  );

?>