title: Lumen - Validation method redirects to root of the website
body: <p>my problem is that my form validation fails but the method <code>$this-&gt;validate($request, $rules, $messages)</code> wont redirect <code>-&gt; back()</code> instead it redirects to the root page <code>/</code>.</p>
  
  <p>Is there any possibility to change redirect when validation fails?</p>