title: Is there a way to bypass the laravel unique validation string length check?
body: <p>While using the laravel built-in "unique" validation, the "length must greater than 3" keeps coming up. Is there a way to bypass or overwride? 
  My validation is like: <code>'code' =&gt; 'required|unique:country,code',</code>
  Will pass the 1st validation(required) and hang on the unique part for my term is only 2 characters like "TW" or "US". 
  Thank you for your help.</p>