Codes for Medium article

user_session_live.html.leex

<%= if !@email do %>
  <%= form_for :user, "#", [phx_submit: :login]\, fn f ->  %>
  	<%= label f, :email, "E-mail"  %>
	  <%= email_input f, :email, required: true %>
	  <%= if @email_input_error do %>
		  <span> <%= @email_input_error %> </span>
	  <% end %>

	  <%= submit "Continue" %>
	<% end %>
<% end %>
<%= if  @email && !@email_input_errors do %>
  <%= form_for :user, Routes.user_session_path(@socket, :create), [as: :user], fn f -> %>
    <%= hidden_input f, :email, value: @email %>

    <%= label f, :code, "Code" %>	
    <%= text_input f, :code, required: true %>

    <%= submit "Confirm code" %>
  <% end %>
<% end %>