What is your question/issue?

So I am building an application with Node. It's a consignment sort of an application and I want each user that registered acquires a subdomain.

example.com - root domain
user.example.com - when a user creates an account

What technologies are you using?

I am using Nodejs for the API and React as the UI.

What were you expecting to happen?

I just need an idea or resources to achieve new user, a new subdomain

What is actually happening?

I haven't tried out anything yet.