Show author under featured post.

Okay so I would like to show post author under my featured posts and I found the code that shows the post date and the category(under the featured post). It goes like this

<p class="postmetadata"><?php if ($wpzoom_homepost_date == 'Show') { ?><?php the_time("$dateformat"); ?><?php } ?><?php if ($wpzoom_homepost_date == 'Show' &&
 $wpzoom_homepost_cat == 'Show') { ?> / <?php } ?><?php if ($wpzoom_homepost_cat == 'Show') { ?><?php the_category(', '); ?><?php } ?></p>

I have tried to edit/play with this for really long already. Can someone help with this? If it’s possible can you make this code show all three options: date, category and author?