Laravel 5.3 LoginController - Header may not contain more than a single header, new line detected

Question

I have a problem when changing the default LoginController redirect after login, I\'m getting an ErrorException in Response.php line 339: Header may not

Answer 1

public $redirectTo = '/lender/home';

protected function redirectTo()
{
    if(\Auth::guard('lender')->check()){
      $this->redirectTo = '/lender/home';
      return $this->redirectTo;
    }
}