local array = require "util.array";

module:add_item("openid-claim", "groups");

local group_memberships = module:open_store("groups", "map");

local function user_groups(username)

	return pairs(group_memberships:get_all(username) or {});

end

module:hook("token/userinfo", function(event)

	local userinfo = event.userinfo;

	if event.claims:contains("groups") then

		userinfo.groups = array(user_groups(event.username));

	end

end);