Woocommerce not sending the auto generated password.

Hey.
I have an issue with woocommerce. I am trying to make automatically make an user after checkout and then e-mail the username and password to the buyer.
However this just send me a blank generated password, like this:

View post on imgur.com

I guess this code is faulty?
$wc->customer_new_account($user_id, $random_password, $password_generated = true );

  // get all the order data
  $order = new WC_Order($order_id);
  
  //get the user email from the order
  $order_email = $order->billing_email;
    
  // check if there are any users with the billing email as user or email
  $email = email_exists( $order_email );  
  $user = username_exists( $order_email );
  
  // if the UID is null, then it's a guest checkout
  if( $user == false && $email == false ){
    
    // random password with 12 chars
    $random_password = wp_generate_password();
    
    // create new user with email as username & newly created pw
    $user_id = wp_create_user( $order_email, $random_password, $order_email );
    
    //WC guest customer identification
    update_user_meta( $user_id, 'guest', 'yes' );
    
    //send PW
    $wc = new WC_Emails();
    $wc->customer_new_account($user_id, $random_password, $password_generated = true );
    
    //first name
    update_user_meta( $user_id, 'first_name', $order->$order->get_billing_first_name() );
    update_user_meta( $user_id, 'last_name', $order->get_billing_last_name() );
    
    //user's billing data
    update_user_meta( $user_id, 'billing_address_1', $order->billing_address_1 );
    update_user_meta( $user_id, 'billing_address_2', $order->billing_address_2 );
    update_user_meta( $user_id, 'billing_city', $order->billing_city );
    update_user_meta( $user_id, 'billing_company', $order->billing_company );
    update_user_meta( $user_id, 'billing_country', $order->billing_country );
    update_user_meta( $user_id, 'billing_email', $order->billing_email );
    update_user_meta( $user_id, 'billing_first_name', $order->billing_first_name );
    update_user_meta( $user_id, 'billing_last_name', $order->billing_last_name );
    update_user_meta( $user_id, 'billing_phone', $order->billing_phone );
    update_user_meta( $user_id, 'billing_postcode', $order->billing_postcode );
    update_user_meta( $user_id, 'billing_state', $order->billing_state );
 
    // user's shipping data
    update_user_meta( $user_id, 'shipping_address_1', $order->shipping_address_1 );
    update_user_meta( $user_id, 'shipping_address_2', $order->shipping_address_2 );
    update_user_meta( $user_id, 'shipping_city', $order->shipping_city );
    update_user_meta( $user_id, 'shipping_company', $order->shipping_company );
    update_user_meta( $user_id, 'shipping_country', $order->shipping_country );
    update_user_meta( $user_id, 'shipping_first_name', $order->shipping_first_name );
    update_user_meta( $user_id, 'shipping_last_name', $order->shipping_last_name );
    update_user_meta( $user_id, 'shipping_method', $order->shipping_method );
    update_user_meta( $user_id, 'shipping_postcode', $order->shipping_postcode );
    update_user_meta( $user_id, 'shipping_state', $order->shipping_state );
    
    // link past orders to this newly created customer
    wc_update_new_customer_past_orders( $user_id );
  }
  
}