Logout message using shield

I've tried the following approaches in order to send a logout message to the login view while using CI4 Shield:

PHP Code:

auth()->logout();
session()->setFlashdata('message', 'This is a message!');
return redirect()->to('login'); 


Also:

PHP Code:

auth()->logout();
return redirect()->to('login')->with('message', 'This is a message'); 


But both didn't work. What is the standard procedure to do a logout while passing a logout message other than 'successLogout'?