It is necessary to check if the user has chosen only me to share [facebook api]

I'm trying to figure out how I can tell if a user is using a link to their channel by only selecting me as an option. I want to know this because if a user shares my link to himself, then my website will not be promoted.

<div id="fb-share">Share</div>
<div class="social-share-wrap"></div>
jQuery('#fb-share').on('click', function() {
        checkLoginState();
    });

    function statusChangeCallback(response) {
        console.log(response);
        if (response.status === 'connected') {
            shareUrl();
        } else if (response.status === 'not_authorized') {
            checkLoginState();
        } else {
            checkLoginState();
        }
    };

    function checkLoginState() {
        FB.login(function (response) {
            console.log(response);
            statusChangeCallback(response);
        }, {scope: 'email'});
    };

function shareUrl() {
        FB.ui({
            method: 'feed',
            link: 'http://www.example.com',
        }, function(response) {
            if (response && response.post_id) {
                FB.api('/me', function (response) {
                    jQuery.post('test.php',{name: response.name, email: response.email}).done(function(data) {
                        jQuery('.social-share-wrap').html(data);
                        jQuery.fancybox({
                            href: '#social-share',
                            centerOnScroll: true,
                            hideOnOverlayClick: false
                        });
                        return false;
                    });
                });
            } else {
                console.log('cancelled by user');
            }
        });
    };

      

        
        
        
      

    

In the code above, what I do, when the user clicks on the share div, the user gets a login popup, and then the user gets a permission popup, and then the share iframe appears if the user successfully shares their information to test.php, and if the user cancels it, it logs into the console. I didn't find anything in the api where I can find out if the user selects custom and installs it just for me.