Is this part of thephoenixtutorial (1.6) outdated?

Currently reading and experimenting through, which is in 1.6 Chapter 7: Sign up | Phoenix Tutorial (Phoenix 1.6) | Softcover.io
In regard to Phoenix 1.8.5, especially 7.2 Signup form described in the link,

<div class="row">
  <div class="mx-auto col-md-6 col-md-offset-3">
    <%= form_for @changeset, Routes.user_path(@conn, :create), fn f -> %>
      <%= label :user, :name %>
      <%= text_input f, :name %>

      <%= label :user, :email %>
      <%= email_input f, :email %>

      <%= label :user, :password %>
      <%= password_input f, :password %>

      <%= label :user, :password_confirmation, "Confirmation" %>
      <%= password_input f, :password_confirmation %>

      <%= submit "Create my account", class: "btn btn-primary" %>
    <% end %>
  </div>
</div>

I tried translating that to 1.8.5 but with no success, I haven’t been able to find the right keywords on Google.
Is this kind of form outdated, as in not to use anymore? If so, could you point me to resources to create a simple form in 1.8.5?