Cake\Controller\Component\AuthComponent::logout PHP Method

    public function logout()
    {
        $this->_setDefaults();
        if (empty($this->_authenticateObjects)) {
            $this->constructAuthenticate();
        }
        $user = (array) $this->user();
        $this->dispatchEvent('Auth.logout', [$user]);
        $this->storage()->redirectUrl(false);
        $this->storage()->delete();
        return Router::normalize($this->_config['logoutRedirect']);
    }