I’m new to Elixir/Phoenix. Please forgive me if this is obvious or has been asked before, I’ve looked but cannot find an answer to what is probably a simple question.

In Phoenix, I have an ordinary nested resource: accounts have many users. I want to use LiveView to allow an admin to add one user after another. In my router I have:

resources "/accounts", AccountController do
  live "/users", UserLive.New
end

When an admin visits e.g. /accounts/99/users, I want to show account information, any existing users, and some fields to enter a new user.

My question is how do I access the account_id (99) that would normally be in the params? Also, I assume I want to retrieve the account and existing users in the mount function, is that correct? Something like this:

  def mount(session, socket) do
    account = Accounts.get_account!(?????)
    {:ok, assign(socket, changeset: changeset, account: account)}
  end

Thank you in advance.

Pete