How to Change BuddyPress Mystery Man Graphic without Overwriting Core Image File [closed]

I’ve used this code on my own BuddyPress site. Works like a charm!

// Use a better image than default mystery man
function bp_custom_set_avatar_constants() {
   define( 'BP_AVATAR_DEFAULT', get_stylesheet_directory_uri() . '/images/mystery-man.jpg' );
   define( 'BP_AVATAR_DEFAULT_THUMB', get_stylesheet_directory_uri() . '/images/mystery-man-50.jpg' );
}
add_action( 'bp_init', 'bp_custom_set_avatar_constants', 2 );

Add this to your bp-custom.php file, or, if you’re developing a theme, to your theme’s functions.php file.