AR Invoices pdf password protected

Summary:

Password protected Invoices in AR

Content (required):

When customer invoices are sent to customers, can these be password protected. Therefore each customer that receives an invoice emailed from Fusion AR, when they open it should prompt for a password, can this be done and how

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):