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        //clean but don't work
        public AuthorizationService(
            IPhotoClient photoClient,
            IClientConfiguration configuration,
            IMvxNavigationService navigationService,
            UserInfo userInfo,
            
            IFingerprint fingerprint, // bad boy
            
            )

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        // not clean but it works!!
        public AuthorizationService(
            IPhotoClient photoClient,
            IClientConfiguration configuration,
            IMvxNavigationService navigationService,
            UserInfo userInfo,
            )
        {
            _photoClient = photoClient;
            _configuration = configuration;

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<?xml version="1.0" encoding="utf-8" ?>
<Application xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:rainbows="clr-namespace:Xamarin.Forms.DebugRainbows;assembly=Xamarin.Forms.DebugRainbows" 
             x:Class="StyledApp.App">
    <Application.Resources>
        <ResourceDictionary>
            <Style TargetType="ContentPage" ApplyToDerivedTypes="True">
                <Setter Property="rainbows:DebugRainbow.ShowColors" Value="True" />
                <Setter Property="rainbows:DebugRainbow.ShowGrid" Value="True" />

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    public static class DesignDataLoacator
    {
        public static MainPageViewModel MainPageViewModeDE
        {
            get { return new MainPageViewModel(null) { Title = "Deutsch", ButtonText = "Rechnungen" };  }
        }

        public static MainPageViewModel MainPageViewModePL
        {
            get { return new MainPageViewModel(null) { Title = "Polski", ButtonText = "Faktury" }; }

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        void Submit()
        {
            // USGLY SAMPLE LOGIC = No cultureInfo
            LabelText = Title + " " + EntryText + " € ";

            if (UglyCurtureTextForSample == "UK")
            {
                LabelText = Title + " £" + EntryText ;
            }

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        public static MainPageViewModel MainPageViewModeDE
        {
            get { return new MainPageViewModel(null) { Title = "Deutsch", ButtonText = "Rechnungen".ToUpper() + "€" };  }
        }

        public static MainPageViewModel MainPageViewModePL
        {
            get { return new MainPageViewModel(null) { UglyCurtureTextForSample= "PL", Title = "Polski", ButtonText = "Faktury " + demoSum + "PLN" }; }
        }

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   ///  UGLY  DUMMY DATA = no culture 
        const double demoSum = 99.99;

        public static MainPageViewModel MainPageViewModeDE
        {
            get { return new MainPageViewModel(null) { Title = "Deutsch", ButtonText = "Rechnungen".ToUpper() + "€" };  }
        }

        public static MainPageViewModel MainPageViewModePL
        {