title: Deal with encrypted username/email with Laravel passport
body: <p>I work with an existing application for a client and the username/email are encrypted in the database. I need to do an api for external app/website with Laravel passeport. </p>
  
  <p>App/website will call <a href="http://localhost:81/oauth/token" rel="nofollow noreferrer">http://localhost:81/oauth/token</a>, they will send parameters <code>client_id</code>, <code>client_secret</code>, <code>username</code> and <code>password</code>.  My problem its  with the <code>username</code> parameters, because username are encrypt in my app. How can I encrypt their clear (not encrypted) username with laravel passeport?</p>