Implemented account deletion. Not all cases covered with tests [skip ci]

console/migrations/m200611_123017_accounts_deletion.php

@@ -0,0 +1,15 @@
+<?php
+
+use console\db\Migration;
+
+class m200611_123017_accounts_deletion extends Migration {
+
+    public function safeUp() {
+        $this->addColumn('accounts', 'deleted_at', $this->integer(11)->unsigned());
+    }
+
+    public function safeDown() {
+        $this->dropColumn('accounts', 'deleted_at');
+    }
+
+}