WordPress at a glance
function is not described

_wp_credits_add_profile_link() WP 3.2.0

Retrieve the link to a contributor's WordPress.org profile page.

No Hooks.

Return

Nothing (null).

Usage

_wp_credits_add_profile_link( $display_name, $username, $profiles );
$display_name(string) (required) (passed by reference — &)
The contributor's display name (passed by reference).
$username(string) (required)
The contributor's username.
$profiles(string) (required)
URL to the contributor's WordPress.org profile page.

Code of wp credits add profile link: wp-admin/includes/credits.php WP 5.2.1

<?php
function _wp_credits_add_profile_link( &$display_name, $username, $profiles ) {
	$display_name = '<a href="' . esc_url( sprintf( $profiles, $username ) ) . '">' . esc_html( $display_name ) . '</a>';
}