How do I add my custom Login-In Form

[SuperBurger_]

I have a custom .zip file I want to use that lets user sign up and login in on my site. I have to put it somehow in the header for it to work. The .zip file also has a custom dashboard for me to edit the login-in form. I have no idea how to do this and I am looking for some help. Also, if you need to take a look at the file to understand how it works here is a link to it https://brivium.com/resources/login-as-user-xenforo-2-add-on.380/.

Thanks 

[Adam7]

Thanks for posting, @SuperBurger_.  

If you need to add something to the header go to Settings > SEO > Header Code within the website editor to add your code there. I suspect there's more involved than just pasting in some code, though, and depending on how everything in the zip file is supposed to work it might not work with Weebly.