public Mono<Long> queryGroupId(@NotNull Long requestId) {
        try {
            Validator.notNull(requestId, "requestId");
        } catch (ResponseException e) {
            return Mono.error(e);
        }
        return groupJoinRequestRepository.findGroupId(requestId);
    }
@return requester ID, group ID, and status
turms-service/src/main/java/im/turms/service/domain/group/service/GroupJoinRequestService.java