diff --git a/Moonlight.Client/Implementations/AuthenticationUiHandler.cs b/Moonlight.Client/Implementations/AuthenticationUiHandler.cs
new file mode 100644
index 00000000..fef8e2ad
--- /dev/null
+++ b/Moonlight.Client/Implementations/AuthenticationUiHandler.cs
@@ -0,0 +1,27 @@
+using Microsoft.AspNetCore.Components;
+using MoonCore.Blazor.Helpers;
+using Moonlight.Client.Interfaces;
+using Moonlight.Client.Services;
+using Moonlight.Client.UI.Screens;
+
+namespace Moonlight.Client.Implementations;
+
+public class AuthenticationUiHandler : IAppLoader, IAppScreen
+{
+    public int Priority => 0;
+
+    public Task<bool> ShouldRender(IServiceProvider serviceProvider)
+    {
+        var identityService = serviceProvider.GetRequiredService<IdentityService>();
+        
+        return Task.FromResult(identityService.IsLoggedIn);
+    }
+
+    public RenderFragment Render() => ComponentHelper.FromType<AuthenticationScreen>();
+
+    public async Task Load(IServiceProvider serviceProvider)
+    {
+        var identityService = serviceProvider.GetRequiredService<IdentityService>();
+        await identityService.Check();
+    }
+}
\ No newline at end of file
diff --git a/Moonlight.Client/Interfaces/IAppLoader.cs b/Moonlight.Client/Interfaces/IAppLoader.cs
new file mode 100644
index 00000000..f1e2b5e0
--- /dev/null
+++ b/Moonlight.Client/Interfaces/IAppLoader.cs
@@ -0,0 +1,7 @@
+namespace Moonlight.Client.Interfaces;
+
+public interface IAppLoader
+{
+    public int Priority { get; }
+    public Task Load(IServiceProvider serviceProvider);
+}
\ No newline at end of file
diff --git a/Moonlight.Client/Interfaces/IAppScreen.cs b/Moonlight.Client/Interfaces/IAppScreen.cs
new file mode 100644
index 00000000..2301a9f7
--- /dev/null
+++ b/Moonlight.Client/Interfaces/IAppScreen.cs
@@ -0,0 +1,10 @@
+using Microsoft.AspNetCore.Components;
+
+namespace Moonlight.Client.Interfaces;
+
+public interface IAppScreen
+{
+    public int Priority { get; }
+    public Task<bool> ShouldRender(IServiceProvider serviceProvider);
+    public RenderFragment Render();
+}
\ No newline at end of file
diff --git a/Moonlight.Client/Moonlight.Client.csproj b/Moonlight.Client/Moonlight.Client.csproj
index 6c6bb562..bc3f6ec7 100644
--- a/Moonlight.Client/Moonlight.Client.csproj
+++ b/Moonlight.Client/Moonlight.Client.csproj
@@ -25,7 +25,6 @@
 
     <ItemGroup>
       <Folder Include="Helpers\" />
-      <Folder Include="Services\" />
       <Folder Include="UI\Components\" />
       <Folder Include="wwwroot\css\" />
     </ItemGroup>
diff --git a/Moonlight.Client/Program.cs b/Moonlight.Client/Program.cs
index f4bce8c9..b947e06c 100644
--- a/Moonlight.Client/Program.cs
+++ b/Moonlight.Client/Program.cs
@@ -55,6 +55,10 @@ var implementationService = new ImplementationService();
 
 implementationService.Register<ISidebarItemProvider, DefaultSidebarItemProvider>();
 
+var authUiHandler = new AuthenticationUiHandler();
+implementationService.Register<IAppScreen>(authUiHandler);
+implementationService.Register<IAppLoader>(authUiHandler);
+
 builder.Services.AddSingleton(implementationService);
 
 await builder.Build().RunAsync();
\ No newline at end of file
diff --git a/Moonlight.Client/Services/IdentityService.cs b/Moonlight.Client/Services/IdentityService.cs
new file mode 100644
index 00000000..46fdb9ff
--- /dev/null
+++ b/Moonlight.Client/Services/IdentityService.cs
@@ -0,0 +1,57 @@
+using MoonCore.Blazor.Tailwind.Services;
+using MoonCore.Exceptions;
+using MoonCore.Helpers;
+using Moonlight.Shared.Http.Responses.Auth;
+
+namespace Moonlight.Client.Services;
+
+public class IdentityService
+{
+    public string Username { get; private set; }
+    public string Email { get; private set; }
+    public string[] Permissions { get; private set; }
+    public bool IsLoggedIn { get; private set; }
+
+    public event Func<Task> OnStateChanged;
+
+    private readonly CookieService CookieService;
+    private readonly HttpApiClient ApiClient;
+    
+    public IdentityService(CookieService cookieService, HttpApiClient apiClient)
+    {
+        CookieService = cookieService;
+        ApiClient = apiClient;
+    }
+
+    public async Task Check()
+    {
+        try
+        {
+            var response = await ApiClient.GetJson<CheckResponse>("api/auth/check");
+
+            Username = response.Username;
+            Email = response.Email;
+            Permissions = response.Permissions;
+
+            IsLoggedIn = true;
+        }
+        catch (HttpApiException)
+        {
+            IsLoggedIn = false;
+        }
+
+        await OnStateChanged();
+    }
+
+    public async Task Login(string token)
+    {
+        await CookieService.SetValue("token", token, 30);
+        await Check();
+    }
+
+    public async Task Logout()
+    {
+        await CookieService.SetValue("token", "", 30);
+        await Check();
+    }
+}
\ No newline at end of file
diff --git a/Moonlight.Client/UI/Layouts/MainLayout.razor b/Moonlight.Client/UI/Layouts/MainLayout.razor
index 5805a534..9a37c48f 100644
--- a/Moonlight.Client/UI/Layouts/MainLayout.razor
+++ b/Moonlight.Client/UI/Layouts/MainLayout.razor
@@ -1,30 +1,53 @@
 @using MoonCore.Helpers
+@using MoonCore.PluginFramework.Services
+@using Moonlight.Client.Interfaces
 @using Moonlight.Client.UI.Partials
 
 @inherits LayoutComponentBase
 
-<div>
-    <AppSidebar Layout="this" />
-    
-    <div class="lg:pl-72">
-        <AppHeader Layout="this"/>
+@inject ImplementationService ImplementationService
+@inject IServiceProvider ServiceProvider
+@inject ILogger<MainLayout> Logger
 
-        <ErrorHandler>
-            <main class="py-10">
-                <div class="px-4 sm:px-6 lg:px-8">
-                    @Body
-                </div>
-            </main>
-        </ErrorHandler>
+@if (IsLoading)
+{
+    <LazyLoader Load="Load">
 
-        <ToastLauncher />
-        <ModalLauncher />
+    </LazyLoader>
+}
+else if (CurrentScreen != null)
+{
+    @CurrentScreen
+}
+else
+{
+    <div>
+        <AppSidebar Layout="this"/>
+
+        <div class="lg:pl-72">
+            <AppHeader Layout="this"/>
+
+            <ErrorHandler>
+                <main class="py-10">
+                    <div class="px-4 sm:px-6 lg:px-8">
+                        <CascadingValue Value="this" IsFixed="true">
+                            @Body
+                        </CascadingValue>
+                    </div>
+                </main>
+            </ErrorHandler>
+        </div>
     </div>
-</div>
+}
+
+<ToastLauncher/>
+<ModalLauncher/>
+
 
 @code
 {
-    public event Func<Task> OnStateChanged; 
+    // Mobile navigation
+    public event Func<Task> OnStateChanged;
     public bool ShowMobileNavigation { get; private set; } = false;
 
     public async Task ToggleMobileNavigation()
@@ -32,4 +55,64 @@
         ShowMobileNavigation = !ShowMobileNavigation;
         await OnStateChanged();
     }
-}
+
+    // App loaders & screens
+    private bool IsLoading = true;
+    private RenderFragment? CurrentScreen;
+
+    private async Task Load(LazyLoader lazyLoader)
+    {
+        await lazyLoader.UpdateText("Retrieving data");
+        await RunLoaders();
+
+        await RenderScreens();
+
+        IsLoading = false;
+        await InvokeAsync(StateHasChanged);
+    }
+
+    public async Task Reload()
+    {
+        IsLoading = true;
+        await InvokeAsync(StateHasChanged);
+    }
+
+    private async Task RunLoaders()
+    {
+        var appLoaders = ImplementationService
+            .Get<IAppLoader>()
+            .OrderBy(x => x.Priority);
+
+        foreach (var loader in appLoaders) //TODO: Measure performance of every loader?
+        {
+            try
+            {
+                await loader.Load(ServiceProvider);
+            }
+            catch (Exception e)
+            {
+                Logger.LogCritical("An app loader threw an unhandled exception: {e}", e);
+            }
+        }
+    }
+
+    public async Task RenderScreens()
+    {
+        CurrentScreen = null;
+
+        var appScreens = ImplementationService
+            .Get<IAppScreen>()
+            .OrderBy(x => x.Priority);
+
+        foreach (var screen in appScreens)
+        {
+            if (!await screen.ShouldRender(ServiceProvider))
+                continue;
+
+            CurrentScreen = screen.Render();
+            await InvokeAsync(StateHasChanged);
+
+            return;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Moonlight.Client/UI/Screens/AuthenticationScreen.razor b/Moonlight.Client/UI/Screens/AuthenticationScreen.razor
new file mode 100644
index 00000000..3b1cbbf6
--- /dev/null
+++ b/Moonlight.Client/UI/Screens/AuthenticationScreen.razor
@@ -0,0 +1,18 @@
+@page "/auth/register"
+@page "/auth/login"
+
+@inject NavigationManager Navigation
+
+@{
+    var url = new Uri(Navigation.Uri);
+    var isRegister = url.LocalPath.StartsWith("/auth/register");
+}
+
+@if (isRegister)
+{
+    
+}
+else
+{
+    
+}
\ No newline at end of file