you are not coding a login, all you are doing is opening the default Wix login lightbox. As you have mentioned in your above post in the wix editor, without using wix code, it is possible to disable social login for the default Wix login lightbox
if you want to code a login page without social login buttons then you can create a new page then place input boxes on the page for email and password and a button for login, then use the code below