def send_email(service, user_id, message):
	"""
	Send an email via Gmail API
		:service: (googleapiclient.discovery.Resource) authorized Gmail API service instance
		:user_id: (str) sender's email address, used for special "me" value (authenticated Gmail account)
		:message: (base64) message to be sent
	"""
	try:
		message = (service.users().messages().send(userId=user_id, body=message).execute())
		return message
	except Exception as e:
		print("err: problem sending email")
		print(e)