title: How to change content_subtype to html in django email_user
body: <p>I read about django email confirmation form this <a href="https://simpleisbetterthancomplex.com/tutorial/2017/02/18/how-to-create-user-sign-up-view.html#sign-up-with-confirmation-mail" rel="nofollow noreferrer">tutorial</a>. Now I need to send html mail not a simple string. I read this <a href="https://stackoverflow.com/a/34895780/8258902">answer</a> on how to send html email in django. Is there a way to change content_subtype to html in this tutorial email sending approach? or any other way to send html mail in this approach?</p>
  
  <pre><code>current_site = get_current_site(request)
  subject = 'Activate Your Account'
  message = render_to_string('account_activation_email.html', {
      'user': user,
      'domain': current_site.domain,
      'uid': urlsafe_base64_encode(force_bytes(user.pk)).decode(),
      'token': account_activation_token.make_token(user),
      })
  user.email_user(subject, message)
  </code></pre>