title: Multiple instances of Firebase
body: <p>I am developing an Android application. Actually my app is for Societies/Apartments use. And I am using Firebase to store all the data of the app. I have a Firebase database and I want to assign one instance of Database to one society. Like Society A will have one instance of database. Society B will have another instance of same Database. And so on. And master database will have the link of all its instances of database. 
  How can I achieve it? 
  I also wanted to know How many instances of a database can we create in Firebase for one project? </p>