discourse/app/views/users/authorize_email.html.erb

<div id="simple-container">
  <%if flash[:error]%>
    <div class='alert alert-error'>
      <%=flash[:error]%>
    </div>
  <%else%>
    <h2><%= t 'change_email.confirmed' %></h2>
    <br>
    <a class="btn" href="/"><%= t('change_email.please_continue', site_name: SiteSetting.title) %></a>
    <%= render partial: 'auto_redirect_home' %>
  <%end%>
</div>