Model Ownership

I'm still struggling with the concept of model ownership. What I mean by that is coming up with a way to show who created a particular row in the database through my application. Lets say I have 3 administrators and one of them creates a new user which is only a basic user permissions for the application and I want to show which admin registered that user. I have what I think is a correct migration for something like this but if someone could help me understand if there's a better way to go about this I would certain consider it.

<?php

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateUsersTables extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('user_accounts', function (Blueprint $table) {
            $table->engine = 'InnoDB';
            $table->increments('id');
            $table->string('first_name');
            $table->string('last_name');
            $table->string('username')->unique();
            $table->string('email')->unique();
            $table->string('password', 60);
            $table->string('avatar')->unique()->nullable();
            $table->integer('status_id')->unsigned()->default(1);
            $table->integer('role_id')->unsigned();
            $table->integer('creator_id')->unsigned();
            $table->rememberToken();
            $table->timestamps();
            $table->softDeletes();
        });

        Schema::create('user_accounts_profiles', function (Blueprint $table) {
            $table->engine = 'InnoDB';
            $table->increments('id');
            $table->integer('user_id')->unsigned()->index();
            $table->string('biography')->nullable();
            $table->string('address')->nullable();
            $table->string('city')->nullable();
            $table->string('state')->nullable();
            $table->integer('postcode')->nullable();
            $table->string('country')->nullable();
            $table->string('phone')->nullable();
            $table->timestamp('birthday')->nullable();
            $table->string('facebook_username')->unique()->nullable();
            $table->string('twitter_username')->unique()->nullable();
            $table->string('google_plus_username')->unique()->nullable();
            $table->string('behance_username')->unique()->nullable();
            $table->string('pinterest_username')->unique()->nullable();
            $table->string('linkedin_username')->unique()->nullable();
            $table->string('github_username')->unique()->nullable();
            $table->string('youtube_username')->unique()->nullable();
            $table->string('instagram_username')->unique()->nullable();
            $table->string('external_link')->unique()->nullable();
            $table->integer('creator_id')->unsigned();
            $table->timestamps();
            $table->softDeletes();
        });

        Schema::create('user_accounts_statuses', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name')->unique();
            $table->string('label')->unique();
            $table->integer('creator_id')->unsigned();
            $table->timestamps();
            $table->softDeletes();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('user_accounts');
        Schema::drop('user_accounts_profiles');
        Schema::drop('user_accounts_statuses');
    }
}

<?php

use App\UserAccountStatus;
use Illuminate\Database\Seeder;

class UserAccountStatusesTableSeeder extends Seeder
{
    public function run()
    {
        factory(UserAccountStatus::class)->create(['name'  => 'Unconfirmed', 'label' => 'unconfirmed']);
        factory(UserAccountStatus::class)->create(['name'  => 'Active', 'label' => 'active']);
        factory(UserAccountStatus::class)->create(['name'  => 'Inactive', 'label' => 'inactive']);
        factory(UserAccountStatus::class)->create(['name'  => 'Suspended', 'label' => 'suspended']);
        factory(UserAccountStatus::class)->create(['name'  => 'Banned', 'label' => 'banned']);
    }
}

<?php

use App\UserAccount;
use App\Role;
use App\UserAccountStatus;
use Illuminate\Database\Seeder;

class UserAccountsTableSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $myUser = factory(UserAccount::class)
            ->create([
                'first_name' => 'John',
                'last_name' => 'Doe',
                'username' => 'jdoe',
                'email' => 'john@example.com',
                'password' => 'testpass123',
                'avatar' => 'johndoe.jpg',
                'status_id' =>  1,
                'role_id' => 5,
                'creator_id' => 1
            ]);

        $myUser->profile()->create([ 'user_id' => 1 ]);

        factory(UserAccount::class, 10)->create()->each(function($u) {
            $u->profile()->save(factory('App\UserAccountProfile')->make());
        });
    }
}

<?php

use Illuminate\Database\Seeder;
use Illuminate\Database\Eloquent\Model;

class DatabaseSeeder extends Seeder
{
    private $tables = [
        'user_accounts',
        'user_accounts_profiles',
        'user_accounts_statuses',
    ];

    private $seeders = [
        'UserAccountsTableSeeder',
        'UserAccountStatusesTableSeeder'
    ];

    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $this->cleanDatabase();

        Model::unguard();

        foreach($this->seeders as $seeder)
        {
            $this->call($seeder);
        }

        Model::reguard();
    }

    private function cleanDatabase()
    {
        DB::statement('SET FOREIGN_KEY_CHECKS=0');

        foreach ($this->tables as $tableName)
        {
            $this->command->info('Deleting existing ' . $tableName . ' data ...');
            DB::table($tableName)->truncate();
        }

        DB::statement('SET FOREIGN_KEY_CHECKS=1');
    }
}