def load_user_id_whitelist(fw):
	"""
	Load user IDs from a FW-group-defined whitelist.
	"""

	# Group name is intentionally not configurable.
	group_name  = 'hpc-whitelist'
	group_perms = fw.get_group(group_name)['permissions']

	return list(map(lambda x: x.id, group_perms))