title: Laravel passport oauth/tokens GET API not working
body: <p>I just installed Passport and added <code>Passport::routes()</code> to my serviceprovider. It gave me these routes <code>/oauth/token POST</code>, <code>/oauth/tokens GET</code>, <code>/oauth/token/{Token_id} DELETE</code>. 
  I am using Password Grant Tokens for authentication(<a href="https://laravel.com/docs/5.6/passport#password-grant-tokens" rel="nofollow noreferrer">https://laravel.com/docs/5.6/passport#password-grant-tokens</a>)</p>
  
  <p>I ran the POST request to make a new token and it created the token just fine. But when I try to run the GET to see all the token, it returns an empty array. I have around 10 tokens already generated in my DB. </p>
  
  <p>Shouldn't I be getting a list of all the oauth tokens that's stored in the database?<br>
  If not, Is there a way to index all the tokens for admin use?</p>