title: Change primary key type
body: <p>My primary key in my model is an uniqid() (13 characters with letters). When I do <code>$user-&gt;id</code> it only shows me the first number and forget the other chars.</p>
  
  <pre><code>App\Models\User::__set_state(array(
     'connection' =&gt; NULL,
     'table' =&gt; NULL,
     'primaryKey' =&gt; 'id',
     'keyType' =&gt; 'int',
     'incrementing' =&gt; true,
     'with' =&gt; 
    array (
    ),
     'perPage' =&gt; 15,
     'exists' =&gt; true,
     'wasRecentlyCreated' =&gt; false,
     'attributes' =&gt; 
    array (
      'id' =&gt; '58acab3993c2e',
      'email' =&gt; 'admin@admin.fr',
      'password' =&gt; '$2y$10$nR.2EnKMX/wCnIbN8Wt36.qF0nPnxcxXM/rIG2SxC0vCX8EtwGQg.',
      'fname' =&gt; 'Foo',
      'lname' =&gt; 'Bar',
      'role' =&gt; 0,
      'website' =&gt; '',
      'description' =&gt; '',
      'phone' =&gt; '',
      'picture' =&gt; 'static/uploads/58acab3993c2e.jpg',
      'admin' =&gt; 1,
      'accepted' =&gt; 1,
    ),
  </code></pre>
  
  <p>I think it's because my keyType is an int... How do I change this ? I use eloquent with slim.</p>