text: from flask import render_template, current_app
  from flask_mail import Message
  from threading import Thread
  from app import mail
  
  
  def send_async_email(app, msg, subject, to):
      with app.app_context():
          try:
              mail.send(msg)
          except:
              app.logger.info(
                  f'Failed to send email <{subject}> to user <{to}>')
  
  
  def send_email(to, subject, template, **kwargs):
      """
      Send email to the user
      """
      if not current_app.config['SEND_CONFIRM_EMAIL']:
          return
      sender = f'InstaHarvest <{current_app.config["MAIL_USERNAME"]}>'
      msg = Message(subject, sender=sender, recipients=[to])
      msg.body = render_template(template + '.txt', **kwargs)
      msg.html = render_template(template + '.html', **kwargs)
      thr = Thread(target=send_async_email, args=[
                   current_app._get_current_object(), msg, subject, to])
      thr.start()
      return thr
  