Godot firebase storage

firebase_storage.gd

extends Node

var firebase = null;
var sqlbridge = null;

func _ready():
        if OS.get_name() == "Android":
                firebase = Globals.get_singleton("FireBase");
                sqlbridge = Globals.get_singleton("SQLBridge");

                firebase.initWithFile("res://godot-firebase-config.json", get_instance_ID());

                get_node("Buttons/Upload").connect("button_down", self, "upload");
                get_node("Buttons/Download").connect("button_down", self, "download");
        pass

func upload():
        #firebase.upload("user://file", "userData");
        
        firebase.upload("images/file.png", "images"); # uploades sdcard0/images/file.png => firebase - root/images
        pass

func download():
        firebase.download("images/file.png", "images");
        pass

func _recive_message(from, key, data):
        if from == "FireBase":
                print("Key: ", key, " Data: ", data);
        pass