trying to add my codre to the page
when I use iframe the vendor I use for client to log into does not allow frames
trying to add my code to the pagey site without iframe?
You can just make up your own custom login and register lightboxes....
https://www.youtube.com/watch?v=QbH8_eudjbE - video for tutorial below....
..... or you can use Wix's own signup form.
If you set up your own custom lightboxes, then you need to change your signup settings so that it loads yours up instead of Wix's own windows still.
Api reference for register.
Api reference for login.
Finally note that if you use your own custom lightboxes, then you can't use social logins.
If you still need html then have a look at Wix Support pages for it.
Also, note that you can pass data to and from a page to a html frame and vice versa using code with on message and post message.