Multiple Author

/**
This snippet will create new event placeholder to display multiple authors of the event.

might be possible using custom codes and plugins:

1. download and install wp plugin Co-Authors Plus

once installed; you can now create events with multiple authors

2. open your theme functions.php and paste this snippet

*/
add_filter('em_event_output_placeholder','my_em_placeholder_mod_add_event_contact',1,3);
function my_em_placeholder_mod_add_event_contact($replace, $EM_Event, $result){
    if ( $result == '#_EVENTMULTIPLEAUTHOR' && function_exists('coauthors_posts_links') ) {
        $replace = coauthors_posts_links( null, null, null, null, false );
    }
    return $replace;
}
Usage: you can now use placeholder #_EVENTMULTIPLEAUTHOR