How to get currently logged user in AppPanelProvider?

In AppPanelProvider::panel() I have

$user = Auth::user();

$user = Auth::user();

$user = Auth::user();

$user = Auth::user();, but the result is

NULL

NULL

NULL

NULL i.e. it seems that the currently logged user is not available in this method. Is there a way to have access to it in this method?