How to remove registration fields and replace email to nickname login? [opencart 3]

How to remove registration fields and replace email to nickname login?
yea, i saw similar question, but he's about 1.5 version

you can modify your register.tpl file, set the fields to hidden or display none. That will hide it from the customer's view.

Then, modify the controller file (register.php) to remove validation for those hidden fields. And you are done!