title: Multiple Accounts suddenly added in Firebase Authentication
body: <p>I'm currently developing an app which is only accessible by me for now. I can already connect to Firebase but somehow I noticed that there's alot of unknown email added. I'm expecting it to have around 4 email which I have used for testing. May I know why this happened? And will this affect my app if ever I finished developing it?</p>
  <p>Note that I didn't share/upload any info/keys that I'm using.
  I was thinking that someone might have used my info/keys mistakenly that is why this happens.</p>
  <p><a href="https://i.stack.imgur.com/ZSMKN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZSMKN.png" alt="screenshot" /></a></p>