How to get a user's calendar/appointments via a button

Hi,

if I want to create a button that opens up another users calendar/appointments what would I use to call the calendar?

I have a button code that Arlex/Mark gave me and I want to adapt it to show a user's calendar:

$ESuser = ES::user($agent->user_id);

?>

<li>

<button type="button" class="btn btn-warning" 

data-es-conversations-compose

data-id="<?php echo $ESuser->id;?>">

VIEW MY CALENDAR

</button>

</li>

I am guessing it is this line:

data-es-conversations-compose

I have gone through the documentation but there isn't much on the calendar application.

What should that be for a user's calendar - I am hoping the rest of the code is ok?

Kind regards

Mel