I am faced a problem. I have a project which is in firebase. I have used there firebase Authenticate, Firebase realtime database, Firebase function and some more. Now I have changed my decision. I want to make my own server where I will set up and manage everything.
So that I want to backup my project to move all data to other framework like spring boot project.
In this situation how can I get the whole project? User Auth data, Firebase Realtime database, Firestore etc.

How to backup a full project of firebase
You'll have to write code or use the CLI to query all of the data you want, and write it to a place you want.  Firebase does not provide a tool to do all this automatically for an entire project. You will need to deal with each product's data separately.
You can use the Firebase Admin SDK or the Firebase CLI to access data from the products you listed.
See also:

Is it possible to backup Firebase DB?
https://firebase.google.com/docs/firestore/manage-data/export-import
https://firebase.google.com/docs/cli/auth

