I am building an app with `Laravel 5.8` where, after registration or login, the user is redirected to a custom page along with a flashed session data, displayed on the page, that says "Welcome!". 

I noticed that default redirect behavior in the `RegisterController` is a simple string, that does not allow me to add my custom redirect. 

```
  * Where to redirect users after registration.
     *
     * @var string
     *
      protected $redirectTo = '/custompage';

```

I tried modifying this default behavior replacing the string with a function:

```
protected function redirectTo()
{
    /* generate URL dynamically */
     return redirect('/custompage')->with('status', 'Welcome!');
}

```

But I get the Warning 

> 
> ErrorException (E\_WARNING) Header may not contain more than a single
>  header, new line detected
> 
> 
> 

So, how to redirect to the custom page AND add my custom flashed data? Of course without modifying any vendor code. 

Thanks in advance