Wire::setFuel PHP Method

    public static function setFuel($name, $value, $lock = false)
    {
        if (is_null(self::$fuel)) {
            self::$fuel = new Fuel();
        }
        self::$fuel->set($name, $value, $lock);
    }

 public function setCurrentUser(User $user)
 {
     if (!$user->roles->has("id=" . $this->fuel('config')->guestUserRolePageID)) {
         $guestRole = $this->fuel('roles')->getGuestRole();
         $user->roles->add($guestRole);
     }
     $this->currentUser = $user;
     Wire::setFuel('user', $user);
 }