Load Zopim Chat for members only.

my_pmpro_zopim_wp_footer.php

<?php
/*
	* Load Zopim Live Chat for Members in Level 1 and 2 Only
	* Update lines 13 to 19 with the script provided in your Zopim Dashboard under Settings > Widget
*/
function my_pmpro_zopim_wp_footer() {
	if(is_user_logged_in() && function_exists("pmpro_hasMembershipLevel") && pmpro_hasMembershipLevel(array(1,2)) )
	{
		global $display_name, $user_email;
		get_currentuserinfo();
		?>
		<!--Start of Zopim Live Chat Script-->
		<script type="text/javascript">
		window.$zopim||(function(d,s){var z=$zopim=function(c){z._.push(c)},$=z.s=
		d.createElement(s),e=d.getElementsByTagName(s)[0];z.set=function(o){z.set.
		_.push(o)};z._=[];z.set._=[];$.async=!0;$.setAttribute("charset","utf-8");
		$.src="//v2.zopim.com/YOURZOPIMSCRIPTHERE";z.t=+new Date;$.
		type="text/javascript";e.parentNode.insertBefore($,e)})(document,"script");
		</script>
		<!--End of Zopim Live Chat Script-->
		<script>
		$zopim(function() {
			$zopim.livechat.setName({<?php echo $display_name; ?>});
			$zopim.livechat.setEmail({<?php echo $user_email; ?>});
		});
		</script>
		<?php
	}
}
add_action('wp_footer','my_pmpro_zopim_wp_footer');

This recipe is included in the blog post on "Members-Only Live Chat and Chatrooms using Arrowchat, iFlyChat, Wise Chat, Zopim" at Paid Memberships Pro here: https://www.paidmembershipspro.com/members-live-chat-chatrooms-using-arrowchat-iflychat-wise-chat-zopim/