Woot, we can log into the Nexus through 3.0 code

Wabbajack.App.Wpf/App.xaml.cs

@@ -15,6 +15,7 @@ using Wabbajack.DTOs;
 using Wabbajack.LoginManagers;
 using Wabbajack.Models;
 using Wabbajack.Services.OSIntegrated;
+using Wabbajack.UserIntervention;
 using Wabbajack.Util;
 
 namespace Wabbajack
@@ -47,6 +48,9 @@ namespace Wabbajack
             RxApp.MainThreadScheduler = new DispatcherScheduler(Dispatcher.CurrentDispatcher);
             
             services.AddOSIntegrated();
+
+            services.AddSingleton<CefService>();
+            
             services.AddTransient<MainWindow>();
             services.AddTransient<MainWindowVM>();
             services.AddSingleton<SystemParametersConstructor>();
@@ -61,6 +65,10 @@ namespace Wabbajack
             services.AddTransient<ModListGalleryVM>();
             services.AddTransient<InstallerVM>();
 
+            services.AddTransient<WebBrowserVM>();
+
+            services.AddTransient<NexusLoginHandler>();
+            
             // Login Managers
             services.AddAllSingleton<INeedsLogin, NexusLoginManager>();
             

Wabbajack.App.Wpf/Consts.cs

@@ -1,5 +1,6 @@
 using System;
 using Wabbajack.Paths;
+using Wabbajack.Paths.IO;
 
 namespace Wabbajack;
 
@@ -9,6 +10,7 @@ public static class Consts
     public static Uri WabbajackBuildServerUri => new("https://build.wabbajack.org");
     public static Version CurrentMinimumWabbajackVersion { get; set; } = Version.Parse("2.3.0.0");
     public static bool UseNetworkWorkaroundMode { get; set; } = false;
+    public static AbsolutePath CefCacheLocation { get; } = KnownFolders.WabbajackAppLocal.Combine("Cef");
 
     public static byte SettingsVersion = 0;
 

Wabbajack.App.Wpf/Interventions/AUserIntervention.cs

@@ -2,10 +2,12 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Input;
 using ReactiveUI;
 using Wabbajack.Common;
+using Wabbajack.DTOs.Interventions;
 using Wabbajack.Interventions;
 
 namespace Wabbajack
@@ -18,6 +20,12 @@ namespace Wabbajack
 
         private bool _handled;
         public bool Handled { get => _handled; set => this.RaiseAndSetIfChanged(ref _handled, value); }
+        public CancellationToken Token { get; }
+        public void SetException(Exception exception)
+        {
+            throw new NotImplementedException();
+        }
+
         public abstract void Cancel();
         public ICommand CancelCommand { get; }
 

Wabbajack.App.Wpf/Interventions/IUserIntervention.cs

@@ -1,23 +0,0 @@
-using ReactiveUI;
-
-namespace Wabbajack.Interventions
-{
-    /// <summary>
-    /// Defines a message that requires user interaction. The user must perform some action
-    /// or make a choice. 
-    /// </summary>
-    public interface IUserIntervention : IReactiveObject
-    {
-        /// <summary>
-        /// The user didn't make a choice, so this action should be aborted
-        /// </summary>
-        void Cancel();
-
-        /// <summary>
-        /// Whether the interaction has been handled and no longer needs attention
-        /// Note: This needs to be Reactive so that users can monitor its status
-        /// </summary>
-        bool Handled { get; }
-
-    }
-}

Wabbajack.App.Wpf/Messages/NavigateToGlobal.cs

@@ -11,7 +11,8 @@ public class NavigateToGlobal
         Installer,
         Settings,
         Compiler,
-        ModListContents
+        ModListContents,
+        WebBrowser
     }
 
     public ScreenType Screen { get; }

Wabbajack.App.Wpf/Messages/NexusLogin.cs

@@ -1,16 +1,28 @@
+using System;
+using System.Threading;
 using System.Threading.Tasks;
 using ReactiveUI;
+using Wabbajack.DTOs.Interventions;
 using Wabbajack.Networking.Http.Interfaces;
 
 namespace Wabbajack.Messages;
 
-public class NexusLogin
+public class NexusLogin : IUserIntervention
 {
-    private TaskCompletionSource CompletionSource { get; }
+    private readonly CancellationTokenSource _source;
+    public TaskCompletionSource CompletionSource { get; }
+    public CancellationToken Token => _source.Token;
+    public void SetException(Exception exception)
+    {
+        CompletionSource.SetException(exception);
+        _source.Cancel();
+    }
 
     public NexusLogin()
     {
         CompletionSource = new TaskCompletionSource();
+        _source = new CancellationTokenSource();
+        
     }
 
     public static Task Send()
@@ -19,4 +31,12 @@ public class NexusLogin
         MessageBus.Current.SendMessage(msg);
         return msg.CompletionSource.Task;
     }
+
+    public void Cancel()
+    {
+        _source.Cancel();
+        CompletionSource.TrySetCanceled();
+    }
+
+    public bool Handled => CompletionSource.Task.IsCompleted;
 }

Wabbajack.App.Wpf/Models/CefService.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Threading.Tasks;
+using CefSharp;
+using CefSharp.Wpf;
+using Microsoft.Extensions.Logging;
+
+namespace Wabbajack.Models;
+
+public class CefService
+{
+    private readonly ILogger<CefService> _logger;
+    private bool Inited { get;  set; } = false;
+    
+    public Func<IBrowser, IFrame, string, IRequest, IResourceHandler>? SchemeHandler { get; set; }
+
+    public CefService(ILogger<CefService> logger)
+    {
+        _logger = logger;
+        Inited = false;
+        Init();
+    }
+
+    public IWebBrowser CreateBrowser()
+    {
+        return new ChromiumWebBrowser();
+    }
+    private void Init()
+    {
+        if (Inited || Cef.IsInitialized) return;
+        Inited = true;
+        var settings = new CefSettings
+        {
+            CachePath = Consts.CefCacheLocation.ToString(),
+            JavascriptFlags = "--noexpose_wasm"
+        };
+        settings.RegisterScheme(new CefCustomScheme()
+        {
+            SchemeName = "wabbajack", 
+            SchemeHandlerFactory = new SchemeHandlerFactor(_logger, this)
+        });
+        
+        _logger.LogInformation("Initializing Cef");
+        if (!Cef.Initialize(settings))
+        {
+            _logger.LogError("Cannot initialize CEF");
+        }
+    }
+
+    private class SchemeHandlerFactor : ISchemeHandlerFactory
+    {
+        private readonly ILogger _logger;
+        private readonly CefService _service;
+
+        internal SchemeHandlerFactor(ILogger logger, CefService service)
+        {
+            _logger = logger;
+            _service = service;
+        }
+
+        public IResourceHandler Create(IBrowser browser, IFrame frame, string schemeName, IRequest request)
+        {
+            _logger.LogInformation("Scheme handler Got: {Scheme} : {Url}", schemeName, request.Url);
+            if (_service.SchemeHandler != null && schemeName == "wabbajack")
+            {
+                return _service.SchemeHandler!(browser, frame, schemeName, request);
+            }
+            return new ResourceHandler();
+        }
+    }
+}

Wabbajack.App.Wpf/Models/LoggerProvider.cs

@@ -103,7 +103,7 @@ public class LoggerProvider : ILoggerProvider
         public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception,
             Func<TState, Exception?, string> formatter)
         {
-            Debug.WriteLine(formatter(state, exception));
+            Debug.WriteLine($"{logLevel} - {formatter(state, exception)}");
             _provider._messages.OnNext(new LogMessage<TState>(DateTime.UtcNow, _provider.NextMessageId(), logLevel,
                 eventId, state, exception, formatter));
         }

Wabbajack.App.Wpf/UserIntervention/NexusLoginHandler.cs

@@ -0,0 +1,111 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using ReactiveUI;
+using Wabbajack.DTOs.Logins;
+using Wabbajack.LibCefHelpers;
+using Wabbajack.Messages;
+using Wabbajack.Networking.Http.Interfaces;
+using Wabbajack.Services.OSIntegrated.TokenProviders;
+
+namespace Wabbajack.UserIntervention;
+
+public class NexusLoginHandler : WebUserInterventionBase
+{
+    private readonly ITokenProvider<NexusApiState> _provider;
+
+    public NexusLoginHandler(ILogger<NexusLoginHandler> logger, WebBrowserVM browserVM, ITokenProvider<NexusApiState> provider) : base(logger, browserVM)
+    {
+        _provider = provider;
+    }
+    public async Task Begin()
+    {
+        try
+        {
+            Messages.NavigateTo.Send(Browser);
+            UpdateStatus("Please log into the Nexus");
+            await Driver.WaitForInitialized();
+            
+            await NavigateTo(new Uri("https://users.nexusmods.com/auth/continue?client_id=nexus&redirect_uri=https://www.nexusmods.com/oauth/callback&response_type=code&referrer=//www.nexusmods.com"));
+
+            Helpers.Cookie[] cookies = {};
+            while (true)
+            {
+                cookies = await Driver.GetCookies("nexusmods.com");
+                if (cookies.Any(c => c.Name == "member_id"))
+                    break;
+                Message.Token.ThrowIfCancellationRequested();
+                await Task.Delay(500, Message.Token);
+            }
+
+
+            await NavigateTo(new Uri("https://www.nexusmods.com/users/myaccount?tab=api"));
+
+            UpdateStatus("Looking for API Key");
+
+            var key = "";
+
+            while (true)
+            {
+                try
+                {
+                    key = await Driver.EvaluateJavaScript(
+                        "document.querySelector(\"input[value=wabbajack]\").parentElement.parentElement.querySelector(\"textarea.application-key\").innerHTML");
+                }
+                catch (Exception)
+                {
+                    // ignored
+                }
+
+                if (!string.IsNullOrEmpty(key))
+                {
+                    break;
+                }
+
+                try
+                {
+                    await Driver.EvaluateJavaScript(
+                        "var found = document.querySelector(\"input[value=wabbajack]\").parentElement.parentElement.querySelector(\"form button[type=submit]\");" +
+                        "found.onclick= function() {return true;};" +
+                        "found.class = \" \"; " +
+                        "found.click();" +
+                        "found.remove(); found = undefined;"
+                    );
+                    UpdateStatus("Generating API Key, Please Wait...");
+
+
+                }
+                catch (Exception)
+                {
+                    // ignored
+                }
+
+                Message.Token.ThrowIfCancellationRequested();
+                await Task.Delay(500, Message.Token);
+            }
+
+
+            await _provider.SetToken(new NexusApiState()
+            {
+                ApiKey = key,
+                Cookies = cookies.Select(c => new Cookie()
+                {
+                    Domain = c.Domain,
+                    Name = c.Name,
+                    Path = c.Path,
+                    Value = c.Value
+                }).ToArray()
+            });
+
+            ((NexusLogin)Message).CompletionSource.SetResult();
+            Messages.NavigateTo.Send(PrevPane);
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "While logging into Nexus Mods");
+            Message.SetException(ex);
+            Messages.NavigateTo.Send(PrevPane);
+        }
+    }
+}

Wabbajack.App.Wpf/UserIntervention/WebUserInterventionBase.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using Wabbajack.DTOs.Interventions;
+using Wabbajack.Interventions;
+using Wabbajack.WebAutomation;
+
+namespace Wabbajack.UserIntervention;
+
+public class WebUserInterventionBase
+{
+    protected readonly WebBrowserVM Browser;
+    protected readonly ILogger Logger;
+    protected IUserIntervention Message;
+    protected ViewModel PrevPane;
+    protected IWebDriver Driver;
+
+    public WebUserInterventionBase(ILogger logger, WebBrowserVM browser)
+    {
+        Logger = logger;
+        Browser = browser;
+        Driver = new CefSharpWrapper(logger, browser.Browser);
+    }
+    
+    public void Configure(ViewModel prevPane, IUserIntervention message)
+    {
+        Message = message;
+        PrevPane = prevPane;
+    }
+
+    protected void UpdateStatus(string status)
+    {
+        Browser.Instructions = status;
+    }
+
+    protected async Task NavigateTo(Uri uri)
+    {
+        await Driver.NavigateTo(uri, Message.Token);
+    }
+
+}

Wabbajack.App.Wpf/View Models/Compilers/CompilerVM.cs

@@ -12,6 +12,7 @@ using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using DynamicData.Binding;
 using ReactiveUI.Fody.Helpers;
+using Wabbajack.DTOs.Interventions;
 
 namespace Wabbajack
 {

Wabbajack.App.Wpf/View Models/Installers/ISubInstallerVM.cs

@@ -1,13 +1,6 @@
-using System;
+using System.Threading.Tasks;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using ReactiveUI;
-using Wabbajack.Common;
 using Wabbajack.Installer;
-using Wabbajack;
+using Wabbajack.DTOs.Interventions;
-using Wabbajack.Interventions;
 
 namespace Wabbajack
 {

Wabbajack.App.Wpf/View Models/Installers/MO2InstallerVM.cs

@@ -13,6 +13,7 @@ using Wabbajack.Common;
 using Wabbajack.Installer;
 using Wabbajack;
 using Wabbajack.DTOs;
+using Wabbajack.DTOs.Interventions;
 using Wabbajack.Interventions;
 using Wabbajack.Util;
 

Wabbajack.App.Wpf/View Models/MainWindowVM.cs

@@ -2,6 +2,7 @@
 using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using System.Reactive.Disposables;
@@ -16,10 +17,12 @@ using Wabbajack.Common;
 using Wabbajack.Downloaders.GameFile;
 using Wabbajack;
 using Wabbajack.Interventions;
+using Wabbajack.LoginManagers;
 using Wabbajack.Messages;
 using Wabbajack.Models;
 using Wabbajack.Networking.WabbajackClientApi;
 using Wabbajack.Paths;
+using Wabbajack.UserIntervention;
 using Wabbajack.View_Models;
 
 namespace Wabbajack
@@ -44,12 +47,16 @@ namespace Wabbajack
         public readonly Lazy<SettingsVM> SettingsPane;
         public readonly ModListGalleryVM Gallery;
         public readonly ModeSelectionVM ModeSelectionVM;
+        public readonly WebBrowserVM WebBrowserVM;
         public readonly Lazy<ModListContentsVM> ModListContentsVM;
         public readonly UserInterventionHandlers UserInterventionHandlers;
         private readonly Client _wjClient;
         private readonly ILogger<MainWindowVM> _logger;
         private readonly ResourceMonitor _resourceMonitor;
 
+        private List<ViewModel> PreviousPanes = new();
+        private readonly IServiceProvider _serviceProvider;
+
         public ICommand CopyVersionCommand { get; }
         public ICommand ShowLoginManagerVM { get; }
         public ICommand OpenSettingsCommand { get; }
@@ -64,11 +71,12 @@ namespace Wabbajack
 
         public MainWindowVM(ILogger<MainWindowVM> logger, MainSettings settings, Client wjClient,
             IServiceProvider serviceProvider, ModeSelectionVM modeSelectionVM, ModListGalleryVM modListGalleryVM, ResourceMonitor resourceMonitor,
-            InstallerVM installer)
+            InstallerVM installer, WebBrowserVM webBrowserVM)
         {
             _logger = logger;
             _wjClient = wjClient;
             _resourceMonitor = resourceMonitor;
+            _serviceProvider = serviceProvider;
             ConverterRegistration.Register();
             Settings = settings;
             Installer = installer;
@@ -76,6 +84,7 @@ namespace Wabbajack
             SettingsPane = new Lazy<SettingsVM>(() => new SettingsVM(serviceProvider.GetRequiredService<ILogger<SettingsVM>>(), this, serviceProvider));
             Gallery = modListGalleryVM;
             ModeSelectionVM = modeSelectionVM;
+            WebBrowserVM = webBrowserVM;
             ModListContentsVM = new Lazy<ModListContentsVM>(() => new ModListContentsVM(serviceProvider.GetRequiredService<ILogger<ModListContentsVM>>(), this));
             UserInterventionHandlers = new UserInterventionHandlers(serviceProvider.GetRequiredService<ILogger<UserInterventionHandlers>>(), this);
 
@@ -83,6 +92,18 @@ namespace Wabbajack
                 .Subscribe(m => HandleNavigateTo(m.Screen))
                 .DisposeWith(CompositeDisposable);
             
+            MessageBus.Current.Listen<NavigateTo>()
+                .Subscribe(m => HandleNavigateTo(m.ViewModel))
+                .DisposeWith(CompositeDisposable);
+
+            MessageBus.Current.Listen<NavigateBack>()
+                .Subscribe(HandleNavigateBack)
+                .DisposeWith(CompositeDisposable);
+
+            MessageBus.Current.Listen<NexusLogin>()
+                .Subscribe(m => HandleNexusLogin(m))
+                .DisposeWith(CompositeDisposable);
+
             _resourceMonitor.Updates
                 .Select(r => string.Join(", ", r.Where(r => r.Throughput > 0)
                     .Select(s => $"{s.Name} - {s.Throughput.ToFileSizeString()}/sec")))
@@ -169,6 +190,24 @@ namespace Wabbajack
                 execute: () => NavigateToGlobal.Send(NavigateToGlobal.ScreenType.Settings));
         }
 
+        private void HandleNavigateTo(ViewModel objViewModel)
+        {
+            ActivePane = objViewModel;
+        }
+
+        private void HandleNexusLogin(NexusLogin nexusLogin)
+        {
+            var handler = _serviceProvider.GetRequiredService<NexusLoginHandler>();
+            handler.Configure(ActivePane, nexusLogin);
+            handler.Begin().FireAndForget();
+        }
+
+        private void HandleNavigateBack(NavigateBack navigateBack)
+        {
+            ActivePane = PreviousPanes.Last();
+            PreviousPanes.RemoveAt(PreviousPanes.Count - 1);
+        }
+
         private void HandleNavigateTo(NavigateToGlobal.ScreenType s)
         {
             ActivePane = s switch
@@ -181,6 +220,7 @@ namespace Wabbajack
             };
         }
 
+
         private static bool IsStartingFromModlist(out AbsolutePath modlistPath)
         {
             /* TODO

Wabbajack.App.Wpf/View Models/UserIntervention/ConfirmUpdateOfExistingInstallVM.cs

@@ -2,9 +2,11 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using Wabbajack.Common;
 using Wabbajack;
+using Wabbajack.DTOs.Interventions;
 using Wabbajack.Interventions;
 
 namespace Wabbajack
@@ -16,6 +18,11 @@ namespace Wabbajack
         public MO2InstallerVM Installer { get; }
 
         public bool Handled => ((IUserIntervention)Source).Handled;
+        public CancellationToken Token { get; }
+        public void SetException(Exception exception)
+        {
+            throw new NotImplementedException();
+        }
 
         public int CpuID => 0;
 

Wabbajack.App.Wpf/View Models/UserInterventionHandlers.cs

@@ -6,6 +6,7 @@ using Microsoft.Extensions.Logging;
 using ReactiveUI;
 using Wabbajack.Common;
 using Wabbajack;
+using Wabbajack.DTOs.Interventions;
 using Wabbajack.Interventions;
 using Wabbajack.Messages;
 
@@ -23,12 +24,13 @@ namespace Wabbajack
             MainWindow = mvm;
         }
 
-        private async Task WrapBrowserJob(IUserIntervention intervention, Func<WebBrowserVM, CancellationTokenSource, Task> toDo)
+        private async Task WrapBrowserJob(IUserIntervention intervention, WebBrowserVM vm, Func<WebBrowserVM, CancellationTokenSource, Task> toDo)
         {
             var wait = await _browserLock.WaitAsync();
             var cancel = new CancellationTokenSource();
             var oldPane = MainWindow.ActivePane;
-            using var vm = await WebBrowserVM.GetNew(_logger);
+            
+            // TODO: FIX using var vm = await WebBrowserVM.GetNew(_logger);
             NavigateTo.Send(vm);
             vm.BackCommand = ReactiveCommand.Create(() =>
             {

Wabbajack.App.Wpf/View Models/WebBrowserVM.cs

@@ -13,19 +13,22 @@ using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
 using Wabbajack;
 using Wabbajack.LibCefHelpers;
+using Wabbajack.Messages;
+using Wabbajack.Models;
 using Wabbajack.WebAutomation;
 
 namespace Wabbajack
 {
     public class WebBrowserVM : ViewModel, IBackNavigatingVM, IDisposable
     {
-        private readonly ILogger _logger;
+        private readonly ILogger<WebBrowserVM> _logger;
+        private readonly CefService _cefService;
 
         [Reactive]
         public string Instructions { get; set; }
 
-        public IWebBrowser Browser { get; } = new ChromiumWebBrowser();
+        public IWebBrowser Browser { get; }
-        public CefSharpWrapper Driver => new(_logger, Browser);
+        public CefSharpWrapper Driver { get; set; }
 
         [Reactive]
         public ViewModel NavigateBackTarget { get; set; }
@@ -36,17 +39,17 @@ namespace Wabbajack
         public Subject<bool> IsBackEnabledSubject { get; } = new Subject<bool>();
         public IObservable<bool> IsBackEnabled { get; }
 
-        private WebBrowserVM(ILogger logger, string url = "http://www.wabbajack.org")
+        public WebBrowserVM(ILogger<WebBrowserVM> logger, CefService cefService)
         {
+            // CefService is required so that Cef is initalized
             _logger = logger;
-            IsBackEnabled = IsBackEnabledSubject.StartWith(true);
+            _cefService = cefService;
             Instructions = "Wabbajack Web Browser";
-        }
             
-        public static async Task<WebBrowserVM> GetNew(ILogger logger, string url = "http://www.wabbajack.org")
+            BackCommand = ReactiveCommand.Create(NavigateBack.Send);
-        {
+            Browser = cefService.CreateBrowser();
-            // Make sure libraries are extracted first
+            Driver = new CefSharpWrapper(_logger, Browser);
-            return new WebBrowserVM(logger, url);
+
         }
 
         public override void Dispose()

Wabbajack.App.Wpf/WebAutomation/CefSharpWrapper.cs

@@ -35,6 +35,7 @@ namespace Wabbajack.WebAutomation
                 _browser.LoadingStateChanged -= handler;
                 tcs.SetResult(true);
             };
+            
             _browser.LoadingStateChanged += handler;
             _browser.Load(uri.ToString());
             token?.Register(() => tcs.TrySetCanceled());

Wabbajack.App.Wpf/WebAutomation/IWebDriver.cs

@@ -15,5 +15,6 @@ namespace Wabbajack.WebAutomation
         Task<string> EvaluateJavaScript(string text);
         Task<Helpers.Cookie[]> GetCookies(string domainPrefix);
         public Action<Uri>? DownloadHandler { get; set; }
+        public Task WaitForInitialized();
     }
 }

Wabbajack.CLI/Verbs/ForceHeal.cs

@@ -102,6 +102,11 @@ public class ForceHeal : IVerb
         
         var ini = meta.LoadIniFile();
         var state = await _downloadDispatcher.ResolveArchive(ini["General"].ToDictionary(d => d.KeyName, d => d.Value));
+        if (state == null)
+        {
+            _logger.LogError("Cannot resolve state from meta for {File}", file);
+            throw new Exception($"Cannot resolve state from meta for {file}");
+        }
 
         _logger.LogInformation("Hashing {File}", file.FileName);
         var hash = await _fileHashCache.FileHashCachedAsync(file, CancellationToken.None);

Wabbajack.DTOs/Interventions/IUserIntervention.cs

@@ -1,3 +1,6 @@
+using System;
+using System.Threading;
+
 namespace Wabbajack.DTOs.Interventions;
 
 /// <summary>
@@ -15,4 +18,11 @@ public interface IUserIntervention
     /// Whether the interaction has been handled and no longer needs attention
     /// </summary>
     bool Handled { get; }
+    
+    /// <summary>
+    /// Token that can be used to trigger cancellation when Cancel() is called.
+    /// </summary>
+    public CancellationToken Token { get; }
+
+    void SetException(Exception exception);
 }

Wabbajack.Networking.GitHub/GithubAuthTokenProvider.cs

@@ -8,4 +8,5 @@ public abstract class GithubAuthTokenProvider : ITokenProvider<string>
     public abstract ValueTask<string> Get();
     public abstract ValueTask SetToken(string val);
     public abstract ValueTask<bool> Delete();
+    public abstract bool HaveToken();
 }