nicer package layout, also in checkout step 1, fixed missing registration language strings, registration error handling, email verification redirect, email verification error handling and messaging,

app/Http/Middleware/NormalizeSignedUrlParameters.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+
+class NormalizeSignedUrlParameters
+{
+    public function handle(Request $request, Closure $next)
+    {
+        $queryString = $request->server->get('QUERY_STRING');
+
+        if (is_string($queryString) && str_contains($queryString, '&amp;')) {
+            $normalized = str_replace('&amp;', '&', $queryString);
+
+            if ($normalized !== $queryString) {
+                $request->server->set('QUERY_STRING', $normalized);
+                parse_str($normalized, $params);
+
+                if (is_array($params) && ! empty($params)) {
+                    $request->query->replace(array_merge($request->query->all(), $params));
+                }
+            }
+        }
+
+        return $next($request);
+    }
+}