discourse/app/views/users_email/confirm.html.erb

<div id="simple-container">
  <% if @update_result == :authorizing_new %>
    <h2><%= t 'change_email.authorizing_old.title' %></h2>
    <br>
    <p><%= t 'change_email.authorizing_old.description' %></p>
  <% elsif @update_result == :complete %>
    <h2><%= t 'change_email.confirmed' %></h2>
    <br>
    <a class="btn" href="/"><%= t('change_email.please_continue', site_name: SiteSetting.title) %></a>
  <% elsif @update_result == :invalid_second_factor%>
    <h2><%= t('login.second_factor_title') %></h2>
    <br>
    <%=form_tag({}, method: :put) do %>
      <%= label_tag(:second_factor_token, t('login.second_factor_description')) %>
      <%= text_field_tag(:second_factor_token, nil, autofocus: true) %><br>
      <% if @show_invalid_second_factor_error %>
        <div class='alert alert-error'><%= t('login.invalid_second_factor_code') %></div>
      <% end %>
      <%= submit_tag t('submit'), class: "btn btn-primary" %>
    <% end %>
  <% else %>
    <div class='alert alert-error'>
      <%=t 'change_email.already_done' %>
    </div>
  <% end %>
</div>