title: How to generate an upload key for Google App Signing?
body: <p>I am currently struggling with the upload key, which is the new method of signing APK's to publish it to Google Play. </p>
  
  <p><strong>What I have done</strong></p>
  
  <ol>
  <li>I created a new app which should now on the play store.</li>
  <li>I created an app entry on the Play console.</li>
  <li>Then I activated <code>Google Play App Signing</code></li>
  <li>I uploaded my signed APK with a normal keystore file.</li>
  </ol>
  
  <p>And then I get the following error message from the upload dialog.</p>
  
  <blockquote>
    <p><strong>Upload failed</strong> You uploaded an APK that is signed with a key that is
    also used to sign APKs that are delivered to users. Because you are
    enrolled in App Signing, you should sign your APK with a new key
    before you upload it.</p>
  </blockquote>
  
  <p><strong>What's the problem</strong></p>
  
  <p>I did not find anything to upload an <code>upload key</code> or how to generate something like this. Is the upload key equal to the keystore file? </p>
  
  <p><strong>What I've tried to do</strong></p>
  
  <p>Then I looked at the documentation of app signing <a href="https://developer.android.com/studio/publish/app-signing.html" rel="noreferrer">here</a>. But I don't understand how I can create this upload key and send it Google.</p>
  
  <p>Can anyone help me?</p>