Eventually I will make chatroom but for now I need some help, I am making this, but I need to save the information because in the way I have it every time some who doesn't own the repl runs it the files delete. Also I need help with the login, and should I store the salts? Also how can I remove the salt from the hashed password or add it to a hashed password? It uses a PBKDF2 algorithm to hash it
Sure, you could use C#'s way to make a simple db client:
maybe I'll make a library for that sometime
after that, all you would do is just store json, and you could parse the json.