I have code that works with an inline template and an attachment, and code that works with a hosted template and no attachment. When I try to use the hosted template with an attachment it is not included. Why is this? Is there a way to have an attachment sent with a hosted template? I have removed any credentials from the below combined cdoe which should use a hosted template and include the attachment: ``` from sparkpost import SparkPost from sparkpost.exceptions import SparkPostAPIException sparky = SparkPost("SPARKPOST_KEY") response = sparky.transmissions.send( from_email={ 'email': sender, 'name': "Test Name" }, recipients=recipient, template=template_id, subject=subject_line, ip_pool='my_mailer', track_opens=True, track_clicks=True, use_draft_template=True, substitution_data={ 'SUBJECT': subject_line, 'ADDRESSEE': addressee_string, 'CONTENT_STRING': content_string, 'SENDER': sender, 'REPLY_TO': reply_to, 'FROM_NAME': from_name }, attachments=[ { 'type': 'application/vnd.ms-excel', 'name': 'file1.xlsx', 'filename': 'file1.xlsx' } ] ) print(response) ```