Added authenication/authorization. Refactored api startup.

JSMR.UI.Blazor/Layout/MainLayout.razor

@@ -1,4 +1,20 @@
-@inherits LayoutComponentBase
+@using JSMR.UI.Blazor.Services
+
+@inject SessionState Session
+
+@inherits LayoutComponentBase
+
+<div class="topbar">
+    @if (Session.IsAuthenticated)
+    {
+        <span>Logged in as <b>@Session.Me?.name</b> (@Session.Me?.role)</span>
+        <a href="" @onclick="OnLogout" style="margin-left: 12px;">Logout</a>
+    }
+    else
+    {
+        <a href="/login">Login</a>
+    }
+</div>
 
 <MudLayout>
     <MudAppBar Elevation="1" Dense="@_dense">
@@ -56,4 +72,21 @@
             StateHasChanged();
         }
     }
+
+    protected override void OnInitialized()
+    {
+        Session.Changed += OnSessionChanged;
+    }
+
+    private void OnSessionChanged() => InvokeAsync(StateHasChanged);
+
+    private async Task OnLogout(MouseEventArgs _)
+    {
+        await Session.LogoutAsync();
+    }
+
+    public void Dispose()
+    {
+        Session.Changed -= OnSessionChanged;
+    }
 }