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%>
    <div id="primary-second-factor-form">
      <h2><%= t('login.second_factor_title') %></h2>
      <br>
      <%=form_tag({}, method: :put) do %>
        <%= label_tag(:second_factor_token, t('login.second_factor_description')) %>
        <div><%= render 'common/second_factor_text_field' %></div>
        <% 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 %>
    </div>

    <%if @backup_codes_enabled %>
      <div id="backup-second-factor-form" style="display: none">
        <h2><%= t('login.second_factor_backup_title') %></h2>
        <br>
        <%= form_tag({}, method: :put) do%>
          <%= label_tag(:second_factor_token, t("login.second_factor_backup_description")) %>
          <div><%= render 'common/second_factor_backup_input' %></div>
          <%= submit_tag(t("submit"), class: "btn btn-primary") %>
        <%end%>

      </div>
      <a href id="toggle-form"><%=t "login.second_factor_backup" %></a>
      <%= render 'common/second_factor_form_script' %>
    <%end%>
  <% else %>
    <div class='alert alert-error'>
      <%=t 'change_email.already_done' %>
    </div>
  <% end %>
</div>