WordPress at a glance
action is not described

auth_cookie_bad_session_token action-hook . WP 1.0

Usage

add_action( 'auth_cookie_bad_session_token', 'action_function_name_8566' );
function action_function_name_8566( $cookie_elements ){
	// action...
}
$cookie_elements
-

Where the hook is called

wp_validate_auth_cookie()
wp-includes/pluggable.php 669
do_action( 'auth_cookie_bad_session_token', $cookie_elements );

Where the hook is used (in WP core)

Does not used.