I tried both solutions but with no luck. These forms are for page forms. I need it to connect to registration.liquid. I found this https://apps.shopify.com/customr?surface_detail=Custom+registration+forms&surface_inter_position=1&s... But again still trying to cut cost and no pay for any extra app.
Thanks for the reply
My name is Kyle and I'm part of the support team here at Helium (we developed the Customer Fields app that you referenced). Our app sounds like it would be a great fit for your needs -- it's designed to collect additional information from customers when they register for an account (or when they edit their account after logging in). The app does have a feature for file uploads so you can easily create a field for ID upload. All of the files that customers upload would be available in the app admin and via Shopify's metafields. The app uses AWS (Amazon Web Services) to host all of the uploaded files in a secure and reliable manner.
I realize that you are trying to keep costs down so using a paid app may not be something you planned for, but it may be worth the cost once you consider the effort it would take to custom build a registration form that's connected to an external server to store the files. Our Customer Fields app has 3 different pricing plans, and based on what you've described you'd most likely only need our 'Basic' plan ($10/mo). We also offer a free 14 day trial so you can test out all features before being charged 👍
If you have any questions feel free to reach out!