I would like to open a modal/popup on my homepage but only to specific users using their roles.

I have a plugin (CP Poll) and I would like only some people to see it. It gives me a shortcode. For example, editors, and show them only once. 
How can I do that ?
I've tried using many extensions but none of them helped me to aim only specific roles. I've also tried with this code 

    <?php if( current_user_can('editor') || current_user_can('administrator') ) {  ?> 
    // stuff here for admins or editors
    <?php } ?>

That I've found [here][1] but it doesn't work. 

Thank you


  [1]: https://wordpress.stackexchange.com/questions/131814/if-current-user-is-admin-or-editor