Android Question Firebase Realtime database error

msgref.Initialize("Reference",realtime.Reference.Child("users/"&Starter.phone.GetSettings("android_id")&"/Messages"),"users/"&Starter.phone.GetSettings("android_id")&"/Messages")

    Dim users() As String
    users = Array As String("Someone", "ErelClone", "AnotherUser")
    Dim rnduser As Int = Rnd(0,users.Length)
    Dim msgs() As String
    msgs = Array As String("Hello there", "Hi Master", "You are great")
    Dim rndmsg As Int = Rnd(0,msgs.Length)
    Dim tit() As String
    tit = Array As String("My subject", "this is the subject", "MyGreatSubject")
    Dim rndtit As Int = Rnd(0,tit.Length)
    msgref.push.setValue(CreateMap("From":users(rnduser),"Title":tit(rndtit),"Message":msgs(rndmsg),"time":DateTime.Now),"MSG","Reference") ' This adds a new key to the tree users/userid/messages/ like seen above in my Screenshot

Msgbox("This message is from: " + from, "")

msgref.Initialize("Reference",realtime.Reference.Child("users/"& phone.GetSettings("android_id")&"/Messages"),"users/"& phone.GetSettings("android_id")&"/Messages")
Dim qry As FBQuery
qry.Initialize("QueryResult",msgref.orderByChild("users").QueryObj)
qry.limitToFirst(10).addListenerForSingleValueEvent

import com.firebase.geofire.GeoLocation;
import anywheresoftware.b4a.AbsObjectWrapper;
import anywheresoftware.b4a.BA;

@BA.ShortName("GeoLocation")
public final class GeoLocationWrapper extends AbsObjectWrapper<GeoLocation> {

    public GeoLocationWrapper(GeoLocation loc) {
        setObject(loc);
    }
    public void Initialize(double lat, double lon) {
        setObject(new GeoLocation(lat,lon));
    }
    public double getlatitude(){
        return getObject().latitude;
    }
    public double getlongitude(){
        return getObject().longitude;
    }
}