How can I build the query for creating a customer with user and password using the client? It's not in the docs. I assume it has to be something like this:

client.mutation(root => {
    root.add("customerCreate", {
      args: {
        input: { email: "jessica.jiang@shopify.com", password: "test123" }
      }
    });

But it would be nice if the docs told more about the logic of building these queries with the client.
Thanks