How to transfer data from SqLite to Firebase real-time database in android?

Question

In my first version of the Android application, I used the SQLite database. Now I want to convert everything to a Firebase real-time database. I no longer want to use the SQLite database due to the standalone capabilities of firebase. Since the previous version of the application has several users, and each has its own data, I do not want the user to lose data during the update of the application. How to transfer a previous version of SQLite database to a new version of the real-time Firebase database? TIA