Check: https://console.firebase.google.com

You need: JavaScript, Firestore (firebase), Real time database (firebase), Google account

i added firestore but how do i add real time database and javascript?

Similar to Firestore, except you choose Realtime database and create a database, for example, in the United States or in a country near Turkey if you want it to work better for all of Turkey. This allows you to structure a data hierarchy, and to create accounts you use Authentication (you add it like Firestore or RTDB, but select authentication).

i added realtime database and authentication,what now?

Look for tutorials on how to use each of the systems you will add: Firestore for chats or forums, RTDB for multiplayer and avatar data management, Authentication for accounts. I don't know much about the topic because I used ChatGPT and I don't want to spend my time watching tutorials to learn JavaScript.

I would like to send you the data hierarchy I have from RTDB and Firestore, but the data is confidential, I'm sorry.

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wHaT