title: How do you identify the Expo project that an Expo Push Notification Token belongs to?
body: <h3>Premise</h3>
  
  <p>For better or for worse, I use two Expo accounts for my production and development environments.</p>
  
  <pre><code>Production  Expo Account: prod-proj
  Development Expo Account: dev-proj
  </code></pre>
  
  <p>I use Expo's push notification service to send push notifications to my users. I store each user's Expo Push Notification Token on their user document. i.e.:</p>
  
  <pre><code>User
    id:    1
    name:  Jimothy
    token: ExponentPushToken[di3ja!-lk2^(24af]
  </code></pre>
  
  <p><strong>Through an unfortunate series of events, most users in my database have a push notification created using the <code>prod-proj</code> Expo project, but a few users have a push notification created using <code>dev-proj</code>.</strong></p>
  
  <hr>
  
  <h3>Problem</h3>
  
  <p>When I try to chunk and send push notifications to all my users, I get an error from Expo:</p>
  
  <blockquote>
    <p>Error: All push notification messages in the same request must be for the same project; separate your push notifications by project.</p>
  </blockquote>
  
  <p>But my tokens are all mixed up! </p>
  
  <p><strong>How can I separate the Expo Push Notification Tokens by project?</strong></p>