Logout user automatically

I have standart laravels authentication system created with php artisan make:auth.

In some conditions, I need automatically logout user from system. I tried somethong like:

if(condition) {
    return redirect('/logout');
}

This trows MethodNotAllowedHttpException

1) why trows this error? because when user clicks same link (laravel's default logout link), then logout works.

and second question: What is correct way, to logout user automatically ?

via Chebli Mohamed