title: Android - Firebase Debug SHA1 certificate
body: <p>I'm trying to implement <code>Firebase Auth</code> with Google Sign In. While adding the android app under my project, it asks me for a <code>Debug signing certificate SHA-1</code>. Now, this project is shared with my team mates and everybody will be running the app through their respective Android Studio software. My queries are:</p>
  
  <ol>
  <li><p>The debug key is going to be different for all of us. Should I be adding SHA1 debug certificate keys of all of my team mates under the Firebase Project Settings? I currently have only mine under it and the other person who ran the app code through their Android Studio couldn't not use Google Sign in on their phone. The signin process would just stop abruptly. </p></li>
  <li><p>Once the app is ready for production, the the app would be distributed through play store. Is there a possibility of them facing problems when they download the app? I'm curious since all their devices will have different keys again. </p></li>
  </ol>