Auth added to blazor

Web/Pages/Login.cshtml.cs

@@ -0,0 +1,20 @@
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.OpenIdConnect;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace Web.Pages
+{
+    public class Login : PageModel
+    {
+        // Can't be put into a razor page
+        public async Task OnGet(string redirectUri)
+        {
+            await HttpContext.ChallengeAsync(OpenIdConnectDefaults.AuthenticationScheme, new AuthenticationProperties()
+            {
+                RedirectUri = redirectUri
+            });
+        }
+    }
+}