title: What happens to Firebase anonymous users?
body: <p>I want to know what will happen to the users of my app that I used anonymous sign in method for them.</p>
  
  <p>The Firebase documentation is really BAD and didn't explain everything and expect developer to find out himself. 
  I found in its old version documentation that anonymous session will expires based on the expiration time has been set in Login &amp; Auth tab, but even there didn't mention this means just the session ends or it means that user id will remove also from my app users list or what EXACTLY happened?</p>
  
  <p>I found <a href="https://stackoverflow.com/questions/37895385/delete-firebase-anonymous-users-after-a-while">this answer</a> but it really is not acceptable. The number of anonymous users will grow very very fast if you do a web app and make every thing hard.
  I even cannot see the number of my app users in my dashboard!!!!!
  So, what should i do? should i develop a dashboard for my data myself or Firebase team should do it? At least for managing users i should have more power than just searching user with their email and when you use custom login you cannot do this also.</p>