where can i add code to display post list from co author

Hello

I don’t know how I must do about this code.

https://vip.wordpress.com/documentation/list-posts-by-a-co-author/

I ‘d like display list of article for co-author.
Where put this code ?

This is my website https://www.bollyconfidential.com

Thank you very much

Sarah

https://www.ads-software.com/plugins/co-authors-plus/