//obicen login od tuka
 private async Task<int> Login(string user, string pass)
        {
            if (!klik)
            {
                klik = true;
                if (false) // mi trebase promenlivata za drug test :D
                {
                    await Navigation.PushAsync(new FiltersPage());
                    klik = false;
                }
                else
                {
                    int rezultat = 0;
                    using (ServiceConnection servis = new ServiceConnection(App.OfficeServiceLink))
                    {
                        //rezultat = await servis.GetConnectionString(user);
                        ConnectionItem item = new ConnectionItem();
                        item.Username = user;
                        rezultat = await servis.PostConnection(item);

                    }
                    if (rezultat > 0)
                    {
                        using (ServiceConnection servis = new ServiceConnection())
                        {
                            try
                            {
                                //string user = username == "" ? txtUsername.Text : username;
                                //string pass = password == "" ? txtPassword.Text : password;
                                if (user != null)
                                {
                                    int rez = await WaitForAndroidIDAsync();
                                    string androidID = "";
                                    if (rez > 0)
                                    {
                                        androidID = App.AndroidID;
                                    }

                                    LoginItem login = new LoginItem();
                                    login.Username = user;
                                    login.Password = pass;

                                    korisnik = await servis.PostLogin(login);

                                    //korisnik = await servis.GetKorisnik(user, pass);
                                    if (korisnik > 0)
                                    {
                                        RememberMe(user, pass);

                                        NotificationPlatformTokenItem Tokenitem = new NotificationPlatformTokenItem();
                                        Tokenitem.KorisnikID = App.Korisnik.KorisnikID;


                                        switch (Device.RuntimePlatform)
                                        {
                                            case Device.Android:
                                                {
                                                    Tokenitem.Token = App.AndroidID;
                                                    Tokenitem.PlatformID = 1;
                                                    //int t = await servis.PostNotificationID(App.Korisnik.Username,Tokenitem);
                                                    int t = await servis.PostNotificationID(Tokenitem);
                                                }
                                                break;
                                            case Device.iOS:
                                                break;
                                            default:
                                                break;
                                        }
                                        DependencyService.Get<IMethods>().SetKorisnikID(korisnik);
                                        await Navigation.PushAsync(new Meni());
                                        klik = false;
                                        return korisnik;
                                    }
                                    else if (korisnik == 0) { await DisplayAlert("Error", "Username or password is incorect", "OK"); }
                                    else { await DisplayAlert("Timeout", "Connection timed out, please try again", "OK"); }

                                }
                                else
                                {
                                    await DisplayAlert("Error", "Please enter username", "OK");
                                }
                                klik = false;
                                return 0;
                            }
                            catch (Exception exp)
                            {
                                //klik = false;
                                //return -1;
                            }
                        }
                    }
                    else if (rezultat == 0)
                    {
                        await DisplayAlert("Error", "Unknown username", "OK");
                    }
                    else
                    {
                        await DisplayAlert("Error", "Please check your internet connection", "OK");
                    }
                }
            }
            klik = false;
            return -1;
        }







//login with fb

        private async Task LoginWithFB(CuspisOffice.FbServices.FacebookUser fbUser)
        {
            try
            {
                //using (ServiceConnection servis = new ServiceConnection(App.OfficeServiceLink))
                //{
                //    //rezultat = await servis.GetConnectionString(user);
                //    ConnectionItem item = new ConnectionItem();
                //    item.Username = user;
                //    rezultat = await servis.PostConnection(item);

                //}

                using (ServiceConnection servis = new ServiceConnection())
                {
                    //FacebookUser item = JsonConvert.DeserializeObject<FacebookUser>(userJason);
                    //String userEmail = fbUser.email;

                    int rezultat = await servis.PostFbUserId(fbUser);
                    if (rezultat == -1)
                    {
                        await DisplayAlert("Greska", "Nastao je problem pri najava sa FB!", "ok");
                        return;
                    }
                    //korisnik = rezultat;
                    string user = fbUser.email, pass = "123456";

                    LoginItem login = new LoginItem();
                    login.Username = user;
                    login.Password = pass;

                    korisnik = await servis.PostLogin(login);
                    //var properties = Xamarin.Forms.Application.Current.Properties;
                    //if(!properties.ContainsKey(""))

                    if (korisnik > 0)
                    {
                        RememberMe(user, pass);

                        NotificationPlatformTokenItem Tokenitem = new NotificationPlatformTokenItem();
                        Tokenitem.KorisnikID = Convert.ToInt32(App.Korisnik.KorisnikID);


                        switch (Device.RuntimePlatform)
                        {
                            case Device.Android:
                                {
                                    Tokenitem.Token = App.AndroidID;
                                    Tokenitem.PlatformID = 1;
                                    //int t = await servis.PostNotificationID(App.Korisnik.Username,Tokenitem);
                                    int t = await servis.PostNotificationID(Tokenitem);
                                }
                                break;
                            case Device.iOS:
                                break;
                            default:
                                break;
                        }
                        DependencyService.Get<IMethods>().SetKorisnikID(korisnik);
                        await Navigation.PushAsync(new Meni());
                        klik = false;
                        //return korisnik;
                    }


                }


            }
            catch (Exception ex)
            {
                await DisplayAlert(ex.Message,ex.StackTrace,"asd");
            }

        }