created a migration

app/Http/Controllers/SignupController.php

@@ -18,7 +18,7 @@ class SignupController extends Controller
             "name" => "required|max:16",
             "username" => "required|unique:users|min:3|max:16",
             "email" => "required|unique:users|email|max:64",
-            "password" => "required|min:8|max:64",
+            "password" => "required|min:8|max:64|confirmed",
         ]);
     }
 }

database/migrations/2024_08_20_001220_add_username_to_users_table.php

@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->string("username");
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropColumn("username");
+        });
+    }
+};