public UserInfo build() {
            Objects.requireNonNull(uuid, "Null UUID");
            if (group && !enabled) {
                throw new IllegalArgumentException("Groups cannot be disabled");
            }
            return new UserInfo(uuid, subjectId, displayName, fullName, group, enabled, deleted);
        }
The friendly display name for the user
Maps to the IDP claim defined by
stroom.security.authentication.openId.userDisplayNameClaim
stroom-util-shared/src/main/java/stroom/util/shared/UserInfo.java