How to create a customer log on page?

This has been suggested: https://usabilitydynamics.com/products/wp-invoice/forum/topic/can-a-customer-subscriber-log-on-to-view-past-invoices-and-payments/?_wpnonce=74692cb791#post-15650

Usability Dynamics – help files would be very helpful. I have given you only one star for your plugin. More than happy to pay for your plugin if you give support and NOT $50.00 per ticket! ! ! !