title: Fields validation default message change in Laravel 5.4
body: <p>I am using this code for validating a field.</p>
  
  <pre><code>$this-&gt;validate($request, [
      'recovery_code' =&gt; 'required|exists:users,email_recovery_code',
      'new_password'=&gt;'required',
      'confirm_password'=&gt;'required|same:new_password',
      ]);
  </code></pre>
  
  <p>and when I enter wrong recovery code i get response </p>
  
  <pre><code>"The selected recovery code is invalid"        
  </code></pre>
  
  <p>but in place of that I want my custom message. Does anyone know how to do it?</p>