title: flutter sign app with cert.dar playConsole
body: <p>I have an app in the playstore created with kodular (similar to appinventor),</p>
  
  <p>I started over with flutter and I like the result</p>
  
  <p>However, when I try to deploy on the playstore, the app is refused with a reason: <code>Your Android App Bundle is signed with the wrong key</code>.</p>
  
  <p>Do I have the upload_cert.der file, and how can I sign the flutter app with that certificate?</p>
  
  <p>(i use android studio)</p>