Started on some MFA access-time checks

Discovered some difficult edge cases:
- User image loading in header bar when using local_secure storage
- 404s showing user-specific visible content due to content listing on
  404 page since user is in semi-logged in state. Maybe need to go
  through and change up how logins are handled to centralise and
  provide us better control at login time to prevent any auth level.

app/Http/Controllers/Auth/MfaController.php

@@ -37,4 +37,18 @@ class MfaController extends Controller
 
         return redirect('/mfa/setup');
     }
+
+    /**
+     * Show the page to start an MFA verification.
+     */
+    public function verify()
+    {
+        $userMethods = user()->mfaValues()
+            ->get(['id', 'method'])
+            ->groupBy('method');
+
+        return view('mfa.verify', [
+            'userMethods' => $userMethods,
+        ]);
+    }
 }