@Override
    public <T> Flux<T> findAll(Class<T> clazz) {
        return findAll(clazz, null);
    }
@author James Chen
@implNote 1. We operate in an unsafe way, which means we don't check whether arguments are legal
          or not and so on 2. The publishers of mongo-java-driver are cold and the publishers of
          TurmsMongoOperations are also cold Reference:
          https://github.com/mongodb/mongo/blob/master/src/mongo/shell/utils_sh.js
turms-server-common/src/main/java/im/turms/server/common/storage/mongo/operation/TurmsMongoOperations.java