Auto generate passwords with Paid Memberships Pro

pmpro-auto-password-generation.php

/*
  Automatically generate password on checkout page.
  
  Note: if you want to remove the entire user area and generate usernames and passwords, simply set the pmpro_skip_account_fields filter to return false.
	
	Use the intstructions here (http://www.paidmembershipspro.com/documentation/advanced-techniques/templates/) to add a checkout page template with the password fields removed.
	
	Uncheck the "Default WP notification email. (Recommended: Leave unchecked. Members will still get an email confirmation from PMPro after checkout.)" option in the PMPro Emails Settings tab.
*/
function my_generate_passwords()
{
	if(!empty($_REQUEST['username']) && empty($_REQUEST['password']))
	{
		$_REQUEST['password'] = pmpro_getDiscountCode() . pmpro_getDiscountCode();	//using two random discount codes
		$_REQUEST['password2'] = $_REQUEST['password'];
	}
}
add_action("init", "my_generate_passwords");

If you setup automatic password generation, don't uncheck the "Default WP notification email" option in the PMPro Emails Settings tab, otherwise your new members won't receive their new passwords over email.

What would be the correct way to set pmpro_skip_account_fields to false? The following didn't seem to work:

$skip_account_fields = apply_filters("pmpro_skip_account_fields", "false");

When the filter is set to false, is the Username that is automatically generated random? Or is the signup email used?

Where am I supposed to place this code? in the checkout.php template or someplace else?

Please can you let me know how I can add this as I put it in the pmpro-customizations plugin but it doesn't reflect on the front-end?