main.py

def getUserShardId(authToken, userStore):
	"""
	Get the User from userStore and return the user's shard ID
	"""
	try:
		user = userStore.getUser(authToken)
	except (Errors.EDAMUserException, Errors.EDAMSystemException), e:
		print "Exception while getting user's shardID:"
		print type(e), e
		return None
	
	if hasattr(user, 'shardId'):
		return user.shardId
	return None