Добавьте файлы проекта.

PlaylistShared.PWA2123/Pages/LoginDisplay.razor

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+@inject NavigationManager Navigation
+
+<AuthorizeView>
+    <Authorized>
+        <MudText Typo="Typo.body2" Class="d-inline mr-2">Hello, @context.User.Identity?.Name!</MudText>
+        <MudButton Variant="Variant.Text" Color="Color.Inherit" OnClick="() => Navigation.NavigateTo("/logout")">Log out</MudButton>
+    </Authorized>
+    <NotAuthorized>
+        <MudLink Href="/login" Color="Color.Inherit" Underline="Underline.Hover" Typo="Typo.body2">Log in</MudLink>
+    </NotAuthorized>
+</AuthorizeView>