title: Pipe character in Firestore rule get() request
body: <p>I have a pipe character (|) in my user id which seems to work with most Firestore rules and requests. However, when i make a <strong>get()</strong> request in a rule then it fails. Does anyone have any suggestions to work around this problem? I have tried the escape character (<strong>%7C</strong>) and backslashes without success.</p>
  
  <p>this fails: </p>
  
  <pre><code>get(/databases/$(database)/documents/preferences/xxxx|xxxxx).data.account
  </code></pre>
  
  <p>this works:</p>
  
  <pre><code>get(/databases/$(database)/documents/preferences/xxxxxxxxx).data.account
  </code></pre>