DatabaseSeeder.php

<?php

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $this->call(UsersTableSeeder::class);
    }
}

output.log

Seeding: UsersTableSeeder

                                         
  [ReflectionException]                  
  Class UsersTableSeeder does not exist  

UsersTableSeeder.php

<?php

use Illuminate\Database\Seeder;

class UsersTableSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        factory(App\User::class)
        factory(App\User::class, 5)->create()

        factory(App\User::class)->make([
            'email' => "websitecommissie@asvgay.nl",
            'password' => bcrypt("secret")
        ]);
    }
}