add username migration

database/migrations/data/20230923_1905_username.php

@@ -0,0 +1,13 @@
+<?php
+
+use Faker\Factory;
+use MapGuesser\PersistentData\Model\User;
+use SokoWeb\Database\Query\Select;
+
+$select = new Select(Container::$dbConnection);
+$users = Container::$persistentDataManager->selectMultipleFromDb($select, User::class);
+
+foreach ($users as $user) {
+    $user->setUsername(Factory::create()->userName);
+    Container::$persistentDataManager->saveToDb($user);
+}

database/migrations/structure/20230923_1905_username.sql

@@ -0,0 +1,3 @@
+ALTER TABLE `users`
+  ADD `username` VARCHAR(255) CHARACTER SET ascii COLLATE ascii_bin DEFAULT NULL AFTER `email`,
+  ADD UNIQUE `username` (`username`);