diff --git a/conf/pika.conf b/conf/pika.conf
index 59aef75fa..d4f0efb01 100644
--- a/conf/pika.conf
+++ b/conf/pika.conf
@@ -691,4 +691,4 @@ dont-compact-sst-created-in-seconds : 20
 # For OBD_Compact 
 # According to the number of sst files in rocksdb, 
 # compact every `compact-every-num-of-files` file.
-best-delete-min-ratio : 10
+best-delete-min-ratio : 10
\ No newline at end of file
diff --git a/include/acl.h b/include/acl.h
index 5aa83d408..77bd5ba8a 100644
--- a/include/acl.h
+++ b/include/acl.h
@@ -129,7 +129,7 @@ class AclSelector {
   friend User;
 
  public:
-  explicit AclSelector() : AclSelector(0){};
+  explicit AclSelector() : AclSelector(0) {};
   explicit AclSelector(uint32_t flag);
   explicit AclSelector(const AclSelector& selector);
   ~AclSelector() = default;
@@ -138,7 +138,7 @@ class AclSelector {
   inline bool HasFlags(uint32_t flag) const { return flags_ & flag; };
   inline void AddFlags(uint32_t flag) { flags_ |= flag; };
   inline void DecFlags(uint32_t flag) { flags_ &= ~flag; };
-  bool EqualChannel(const std::vector<std::string> &allChannel);
+  bool EqualChannel(const std::vector<std::string>& allChannel);
 
  private:
   pstd::Status SetSelector(const std::string& op);
@@ -224,8 +224,7 @@ class User {
   ~User() = default;
 
   std::string Name() const;
-
-  //  inline uint32_t Flags() const { return flags_; };
+  // inline uint32_t Flags() const { return flags_; };
   inline bool HasFlags(uint32_t flag) const { return flags_ & flag; };
   inline void AddFlags(uint32_t flag) { flags_ |= flag; };
   inline void DecFlags(uint32_t flag) { flags_ &= ~flag; };
diff --git a/include/pika_client_conn.h b/include/pika_client_conn.h
index 5b912592a..3124d2036 100644
--- a/include/pika_client_conn.h
+++ b/include/pika_client_conn.h
@@ -22,25 +22,15 @@ struct TimeStat {
     before_queue_ts_ = 0;
   }
 
-  uint64_t start_ts() const {
-    return enqueue_ts_;
-  }
+  uint64_t start_ts() const { return enqueue_ts_; }
 
-  uint64_t total_time() const {
-    return process_done_ts_ > enqueue_ts_ ? process_done_ts_ - enqueue_ts_ : 0;
-  }
+  uint64_t total_time() const { return process_done_ts_ > enqueue_ts_ ? process_done_ts_ - enqueue_ts_ : 0; }
 
-  uint64_t queue_time() const {
-    return dequeue_ts_ > enqueue_ts_ ? dequeue_ts_ - enqueue_ts_ : 0;
-  }
+  uint64_t queue_time() const { return dequeue_ts_ > enqueue_ts_ ? dequeue_ts_ - enqueue_ts_ : 0; }
 
-  uint64_t process_time() const {
-    return process_done_ts_ > dequeue_ts_ ? process_done_ts_ - dequeue_ts_ : 0;
-  }
+  uint64_t process_time() const { return process_done_ts_ > dequeue_ts_ ? process_done_ts_ - dequeue_ts_ : 0; }
 
-  uint64_t before_queue_time() const {
-    return process_done_ts_ > dequeue_ts_ ? before_queue_ts_ - enqueue_ts_ : 0;
-  }
+  uint64_t before_queue_time() const { return process_done_ts_ > dequeue_ts_ ? before_queue_ts_ - enqueue_ts_ : 0; }
 
   uint64_t enqueue_ts_;
   uint64_t dequeue_ts_;
@@ -94,7 +84,7 @@ class PikaClientConn : public net::RedisConn {
   void UnAuth(const std::shared_ptr<User>& user);
 
   bool IsAuthed() const;
-
+  void InitUser();
   bool AuthRequired() const;
 
   std::string UserName() const;
@@ -123,6 +113,7 @@ class PikaClientConn : public net::RedisConn {
   std::vector<std::shared_ptr<std::string>> resp_array;
 
   std::shared_ptr<TimeStat> time_stat_;
+
  private:
   net::ServerThread* const server_thread_;
   std::string current_db_;
diff --git a/src/acl.cc b/src/acl.cc
index bd6862aa8..dad50f73e 100644
--- a/src/acl.cc
+++ b/src/acl.cc
@@ -477,7 +477,11 @@ void Acl::UpdateDefaultUserPassword(const std::string& pass) {
   if (pass.empty()) {
     u->SetUser("nopass");
   } else {
-    u->SetUser(">" + pass);
+    if (g_pika_conf->userpass().empty()) {
+      u->SetUser("nopass");
+    } else {
+      u->SetUser(">" + pass);
+    }
   }
 }
 
@@ -489,27 +493,27 @@ void Acl::InitLimitUser(const std::string& bl, bool limit_exist) {
   auto u = GetUser(DefaultLimitUser);
   if (limit_exist) {
     if (!bl.empty()) {
-      for(auto& cmd : blacklist) {
+      for (auto& cmd : blacklist) {
         cmd = pstd::StringTrim(cmd, " ");
         u->SetUser("-" + cmd);
       }
       u->SetUser("on");
     }
     if (!pass.empty()) {
-      u->SetUser(">"+pass);
+      u->SetUser(">" + pass);
     }
   } else {
     if (pass.empty()) {
       u->SetUser("nopass");
     } else {
-      u->SetUser(">"+pass);
+      u->SetUser(">" + pass);
     }
     u->SetUser("on");
     u->SetUser("+@all");
     u->SetUser("~*");
     u->SetUser("&*");
 
-    for(auto& cmd : blacklist) {
+    for (auto& cmd : blacklist) {
       cmd = pstd::StringTrim(cmd, " ");
       u->SetUser("-" + cmd);
     }
diff --git a/src/pika_client_conn.cc b/src/pika_client_conn.cc
index 37a47bc37..768cb6d5a 100644
--- a/src/pika_client_conn.cc
+++ b/src/pika_client_conn.cc
@@ -30,8 +30,7 @@ PikaClientConn::PikaClientConn(int fd, const std::string& ip_port, net::Thread*
     : RedisConn(fd, ip_port, thread, mpx, handle_type, max_conn_rbuf_size),
       server_thread_(reinterpret_cast<net::ServerThread*>(thread)),
       current_db_(g_pika_conf->default_db()) {
-  // client init, set client user is default, and authenticated = false
-  UnAuth(g_pika_server->Acl()->GetUserLock(Acl::DefaultUser));
+  InitUser();
   time_stat_.reset(new TimeStat());
 }
 
@@ -259,7 +258,7 @@ void PikaClientConn::ProcessMonitor(const PikaCmdArgsType& argv) {
 }
 
 bool PikaClientConn::IsInterceptedByRTC(std::string& opt) {
-  //currently we only Intercept: Get, HGet
+  // currently we only Intercept: Get, HGet
   if (opt == kCmdNameGet && g_pika_conf->GetCacheString()) {
     return true;
   }
@@ -289,11 +288,9 @@ void PikaClientConn::ProcessRedisCmds(const std::vector<net::RedisCmdArgsType>&
     bool is_slow_cmd = g_pika_conf->is_slow_cmd(opt);
     bool is_admin_cmd = g_pika_conf->is_admin_cmd(opt);
 
-    //we don't intercept pipeline batch (argvs.size() > 1)
-    if (g_pika_conf->rtc_cache_read_enabled() &&
-        argvs.size() == 1 && IsInterceptedByRTC(opt) &&
-        PIKA_CACHE_NONE != g_pika_conf->cache_mode() &&
-        !IsInTxn()) {
+    // we don't intercept pipeline batch (argvs.size() > 1)
+    if (g_pika_conf->rtc_cache_read_enabled() && argvs.size() == 1 && IsInterceptedByRTC(opt) &&
+        PIKA_CACHE_NONE != g_pika_conf->cache_mode() && !IsInTxn()) {
       // read in cache
       if (ReadCmdInCache(argvs[0], opt)) {
         delete arg;
@@ -358,21 +355,17 @@ bool PikaClientConn::ReadCmdInCache(const net::RedisCmdArgsType& argv, const std
     resp_num--;
     return false;
   }
-  //acl check
+  // acl check
   int8_t subCmdIndex = -1;
   std::string errKey;
   auto checkRes = user_->CheckUserPermission(c_ptr, argv, subCmdIndex, &errKey);
   std::string object;
-  if (checkRes == AclDeniedCmd::CMD ||
-      checkRes == AclDeniedCmd::KEY ||
-      checkRes == AclDeniedCmd::CHANNEL ||
-      checkRes == AclDeniedCmd::NO_SUB_CMD ||
-      checkRes == AclDeniedCmd::NO_AUTH
-      ) {
-    //acl check failed
+  if (checkRes == AclDeniedCmd::CMD || checkRes == AclDeniedCmd::KEY || checkRes == AclDeniedCmd::CHANNEL ||
+      checkRes == AclDeniedCmd::NO_SUB_CMD || checkRes == AclDeniedCmd::NO_AUTH) {
+    // acl check failed
     return false;
   }
-  //only read command(Get, HGet) will reach here, no need of record lock
+  // only read command(Get, HGet) will reach here, no need of record lock
   bool read_status = c_ptr->DoReadCommandInCache();
   auto cmdstat_map = g_pika_cmd_table_manager->GetCommandStatMap();
   resp_num--;
@@ -547,13 +540,28 @@ void PikaClientConn::UnAuth(const std::shared_ptr<User>& user) {
 }
 
 bool PikaClientConn::IsAuthed() const { return authenticated_; }
-
+void PikaClientConn::InitUser() {
+  if (!g_pika_conf->GetUserBlackList().empty()) {
+    user_ = g_pika_server->Acl()->GetUserLock(Acl::DefaultLimitUser);
+  } else {
+    user_ = g_pika_server->Acl()->GetUserLock(Acl::DefaultUser);
+  }
+  authenticated_ = user_->HasFlags(static_cast<uint32_t>(AclUserFlag::NO_PASS)) &&
+                   !user_->HasFlags(static_cast<uint32_t>(AclUserFlag::DISABLED));
+}
 bool PikaClientConn::AuthRequired() const {
   // If the user does not have a password, and the user is valid, then the user does not need authentication
   // Otherwise, you need to determine whether go has been authenticated
-  return (!user_->HasFlags(static_cast<uint32_t>(AclUserFlag::NO_PASS)) ||
-          user_->HasFlags(static_cast<uint32_t>(AclUserFlag::DISABLED))) &&
-         !IsAuthed();
+  if (IsAuthed()) {
+    return false;
+  }
+  if (user_->HasFlags(static_cast<uint32_t>(AclUserFlag::DISABLED))) {
+    return true;
+  }
+  if (user_->HasFlags(static_cast<uint32_t>(AclUserFlag::NO_PASS))) {
+    return false;
+  }
+  return true;
 }
 std::string PikaClientConn::UserName() const { return user_->Name(); }