Pushing currently broken code.

PcgsInvUi/Views/ApiKeyView.axaml

@@ -0,0 +1,14 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:viewModels="clr-namespace:PcgsInvUi.ViewModels"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="PcgsInvUi.Views.ApiKeyView" x:DataType="viewModels:ApiKeyViewModel" >
+    <StackPanel>
+        <Label Content="API key was not found or did not authenticate." /> 
+        <Label Content="Please enter your API key below:" />
+        <TextBox Margin="10" Text="{Binding ApiKeyInput}" />
+        <Button HorizontalAlignment="Center" Content="Submit" Command="{Binding OkCommand}" />
+    </StackPanel>
+</UserControl>

PcgsInvUi/Views/ApiKeyView.axaml.cs

@@ -0,0 +1,9 @@
+using Avalonia.Controls;
+
+namespace PcgsInvUi.Views; 
+
+public partial class ApiKeyView : UserControl {
+    public ApiKeyView() {
+        InitializeComponent();
+    }
+}

PcgsInvUi/Views/MainWindow.axaml.cs

@@ -1,5 +1,4 @@
 using System;
-using System.IO;
 using System.Reactive;
 using System.Threading.Tasks;
 using Avalonia.Platform.Storage;
@@ -36,6 +35,7 @@ public partial class MainWindow : ReactiveWindow<MainWindowViewModel> {
 
     private async Task ShowFilePickerAsync(InteractionContext<Unit, Uri> interationContext) {
         var topLevel = GetTopLevel(this);
+        if (topLevel is null) throw new Exception("Could not find top level of the file path.");
         var file = await topLevel.StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions {
             Title = "Save CSV...",
             DefaultExtension = ".csv",

PcgsInvUi/Views/NewView.axaml.cs

@@ -1,6 +1,4 @@
-using Avalonia;
-using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
+using Avalonia.Controls;
 
 namespace PcgsInvUi.Views;
 
@@ -8,4 +6,4 @@ public partial class NewView : UserControl {
     public NewView() {
         InitializeComponent();
     }
-}
+}