getting current profile’s user id

Hello,

I’m trying to get the current profile user id. I have read the developer documentation guides and experimented with
$profile_id = um_profile_id();
$display_name = um_user(‘display_name’);
echo um_get_display_name( $user_id );

I am trying to create an if function whereby if (current user profile = sampleuserprofile), then some code is executed

For instance (this did not work)
if (um_user(‘display_name’) = “jack”) {
echo do_shortcode XX
}

I know that the best way to do it would be to if ($user_id= ????) { echo shortcode}, but i cant find specific users’ ids.

Would it be possible to firstly get a function to get current profile id, then check if that profile id is equal to a specific user id?

Thank you so much for your help.