// encoding errors aren't going to get better, so just fail on them.
		data["requestheader-username-headers"], err = jsonSerializeStringSlice(authenticationInfo.RequestHeaderUsernameHeaders.Value())
		if err != nil {
			return nil, err
		}
		data["requestheader-group-headers"], err = jsonSerializeStringSlice(authenticationInfo.RequestHeaderGroupHeaders.Value())
		if err != nil {
			return nil, err
		}