Need multiple users for blog article

Hi Team,
I would like to display multiple users on the single blog page. I could see the plug-in “Co-Authors Plus”. Could you please help me to integrate this plug-in feature into the theme. I have installed it, but can’t find the code for replacing the user section.

Where should i replace this code:

the_author_posts_link() will need to replace it with the following code snippet.
if ( function_exists( ‘coauthors_posts_links’ ) ) {
coauthors_posts_links();
} else {
the_author_posts_link();
}