[Plugin: SimplePie Plugin for WordPress] Change ITEM_AUTHOR_NAME to get WP nice name

Right now I am using Simple Pie for WP plugin and it is doing a great job of pulling in my feed. The only issue I have is it is using the author’s username and not their nice name or nickname. I’d rather have it do that.

What do I need to modify to accomplish this?

Thanks!

https://www.ads-software.com/extend/plugins/simplepie-plugin-for-wordpress/