title: Google play app signing process certificates
body: <p>I am trying to understand the signing process with the Play App Signing.
  Hence couple of questions.</p>
  <ol>
  <li>I am using google maps API, why I need to add SHA-1 certificate fingerprint of App signing key certificate on the console? Why I cant use that SHA 1 which is generated on my pc locally?</li>
  <li>What I need to do with the provate_key.pepk that I generated from release?</li>
  <li>What is the purpose of deployment_cert.der?</li>
  <li>What is the purpose of upload_cert.der?</li>
  </ol>
  <p>Can you please explain me the correct process of signing an app and how to use it?</p>
  <p>Also <a href="https://support.google.com/googleplay/android-developer/answer/9842756#create&amp;zippy=%2Cexisting-apps" rel="nofollow noreferrer">here</a></p>
  <p>Existing apps-&gt;Step 2-&gt;5 Syas: Select the export and upload option that best suits your release process and upload an existing app signing key.</p>
  <p>I do not see an option for upload an existing app signing key...</p>