If you are doing client work on a WordPress theme then it’s nice to put your brand in as many places as you can without affecting the design of the website.

The WordPress dashboard footer is an ideal place to put your credential link.

Copy the following snippet in your functions.php file to change WordPress admin footer branding.

// change footer branding in admin panel
function wcs_remove_admin_footer_branding() {
    echo 'Designed & developed by <a href="http://wpcodesnippet.com" target="_blank">WPCodeSnippet</a>. Powered by <a href="http://www.wordpress.org">WordPress</a>';
}
add_filter( 'admin_footer_text', 'wcs_remove_admin_footer_branding' );