When the user receive a invoice by e-mail they can click pay in the bottom if payment is set !

Where can i change the redirection when they click pay. Redirect to my login page....

OR

Can we fix the ( component/invoices/?view=invoices ) for register only and redirect to login page... after successful login the joomla syst will redirect to the ( component/invoices/?view=invoices )

OR

Can we just find a way to create a menu item in joomla that will catch any (component/invoice.....) link. and set the menu item (private) ?

The objective his to hide the empty invoice page for visitor who have just click the pay button in the mail send by the invoice system.

Thanks.... Sorry if its not perfectly clear... im french and try my best.