I am struggling to construct the statement that will output the user avatar in "large square size"

I followed the documentation and so far i constructed the statement this way

 <?php

	   require_once( JPATH_ADMINISTRATOR . '/components/com_easysocial/includes/foundry.php' );

       $my = Foundry::user();

	?>

and then outputed the image src like this

<img src="<?php echo $my->getAvatar();?>"  alt="" data-src="<?php echo $my->getAvatar();?>" data-src-retina="<?php echo $my->getAvatar();?>" width="90" height="90" />

In documentation is mentioned that there is some $avatarSize arguments available, like: SOCIAL_AVATAR_SMALL, SOCIAL_AVATAR_MEDIUM, SOCIAL_AVATAR_SQUARE, SOCIAL_AVATAR_LARGE

Can you pls help on how to apply this argument ? I would like to apply the "SOCIAL_AVATAR_SQUARE" argument to the above code.

Thanks SO MUCH !