Added migration to store admin ID

Signed-off-by: snipe <snipe@snipe.net>

database/migrations/2022_06_23_164407_add_user_id_to_users.php

@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddUserIdToUsers extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->integer('created_by')->after('activated')->nullable()->default(null);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            if (Schema::hasColumn('users', 'created_by')) {
+                $table->dropColumn('created_by');
+            }
+        });
+    }
+}