restore acore_auth

database/migrations/2026_10_04_000002_allow_missing_email_for_legacy_web_users.php

@@ -0,0 +1,27 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('users', function (Blueprint $table): void {
+            // Accounts created by the old game server may have no email.
+            $table->string('email')->nullable()->change();
+        });
+    }
+
+    public function down(): void
+    {
+        if (DB::table('users')->whereNull('email')->exists()) {
+            throw new RuntimeException('Fill missing user emails before rolling back this migration.');
+        }
+        Schema::table('users', function (Blueprint $table): void {
+            $table->string('email')->nullable(false)->change();
+        });
+    }
+};