diff --git a/include/Client.h b/include/Client.h
index 1cad3ca..3de1a2d 100644
--- a/include/Client.h
+++ b/include/Client.h
@@ -28,34 +28,36 @@ public:
     TVehicleDataLockPair GetAllCars();
     void SetName(const std::string& Name) { mName = Name; }
     void SetRoles(const std::string& Role) { mRole = Role; }
+    void AddIdentifier(const std::string& ID) { mIdentifiers.insert(ID); };
     std::string GetCarData(int Ident);
     void SetUDPAddr(sockaddr_in Addr) { mUDPAddress = Addr; }
     void SetDownSock(SOCKET CSock) { mSocket[1] = CSock; }
     void SetTCPSock(SOCKET CSock) { mSocket[0] = CSock; }
     void SetStatus(int Status) { mStatus = Status; }
     void DeleteCar(int Ident);
-    sockaddr_in GetUDPAddr() const { return mUDPAddress; }
-    std::string GetRoles() const { return mRole; }
-    std::string GetName() const { return mName; }
-    SOCKET GetDownSock() const { return mSocket[1]; }
-    SOCKET GetTCPSock() const { return mSocket[0]; }
+    [[nodiscard]] std::set<std::string> GetIdentifiers() const { return mIdentifiers; }
+    [[nodiscard]] sockaddr_in GetUDPAddr() const { return mUDPAddress; }
+    [[nodiscard]] SOCKET GetDownSock() const { return mSocket[1]; }
+    [[nodiscard]] SOCKET GetTCPSock() const { return mSocket[0]; }
+    [[nodiscard]] std::string GetRoles() const { return mRole; }
+    [[nodiscard]] std::string GetName() const { return mName; }
     void SetID(int ID) { mID = ID; }
-    int GetOpenCarID() const;
-    int GetCarCount() const;
+    [[nodiscard]] int GetOpenCarID() const;
+    [[nodiscard]] int GetCarCount() const;
     void ClearCars();
-    int GetStatus() const { return mStatus; }
-    int GetID() const { return mID; }
-    bool IsConnected() const { return mIsConnected; }
-    bool IsSynced() const { return mIsSynced; }
-    bool IsSyncing() const { return mIsSyncing; }
-    bool IsGuest() const { return mIsGuest; }
+    [[nodiscard]] int GetStatus() const { return mStatus; }
+    [[nodiscard]] int GetID() const { return mID; }
+    [[nodiscard]] bool IsConnected() const { return mIsConnected; }
+    [[nodiscard]] bool IsSynced() const { return mIsSynced; }
+    [[nodiscard]] bool IsSyncing() const { return mIsSyncing; }
+    [[nodiscard]] bool IsGuest() const { return mIsGuest; }
     void SetIsGuest(bool NewIsGuest) { mIsGuest = NewIsGuest; }
     void SetIsSynced(bool NewIsSynced) { mIsSynced = NewIsSynced; }
     void SetIsSyncing(bool NewIsSyncing) { mIsSyncing = NewIsSyncing; }
     void EnqueueMissedPacketDuringSyncing(const std::string& Packet) { mMissedPacketsDuringSyncing.push(Packet); }
-    size_t MissedPacketQueueSize() const { return mMissedPacketsDuringSyncing.size(); }
+    [[nodiscard]] size_t MissedPacketQueueSize() const { return mMissedPacketsDuringSyncing.size(); }
     void SetIsConnected(bool NewIsConnected) { mIsConnected = NewIsConnected; }
-    TServer& Server() const;
+    [[nodiscard]] TServer& Server() const;
     void UpdatePingTime();
     int SecondsSinceLastPing();
 
@@ -65,6 +67,7 @@ private:
     bool mIsSynced = false;
     bool mIsSyncing = false;
     std::queue<std::string> mMissedPacketsDuringSyncing;
+    std::set<std::string> mIdentifiers;
     bool mIsGuest = false;
     std::mutex mVehicleDataMutex;
     TSetOfVehicleData mVehicleData;
diff --git a/src/Client.cpp b/src/Client.cpp
index bd275a2..a8e1369 100644
--- a/src/Client.cpp
+++ b/src/Client.cpp
@@ -60,9 +60,11 @@ void TClient::SetCarData(int Ident, const std::string& Data) {
     }
     DeleteCar(Ident);
 }
+
 int TClient::GetCarCount() const {
     return int(mVehicleData.size());
 }
+
 TServer& TClient::Server() const {
     return mServer;
 }
diff --git a/src/TLuaFile.cpp b/src/TLuaFile.cpp
index c10d06a..21d8c37 100644
--- a/src/TLuaFile.cpp
+++ b/src/TLuaFile.cpp
@@ -321,9 +321,30 @@ int lua_GetAllPlayers(lua_State* L) {
         return 0;
     return 1;
 }
+int lua_GetIdentifiers(lua_State* L){
+    if(lua_isnumber(L,1)){
+        auto MaybeClient = GetClient(Engine().Server(), int(lua_tonumber(L, 1)));
+        if (MaybeClient && !MaybeClient.value().expired()) {
+            auto IDs = MaybeClient.value().lock()->GetIdentifiers();
+            if(IDs.empty())
+                return 0;
+            lua_newtable(L);
+            for(const std::string& ID : IDs){
+                lua_pushstring(L, ID.substr(0,ID.find(':')).c_str());
+                lua_pushstring(L, ID.c_str());
+                lua_settable(L, -3);
+            }
+        }else
+            return 0;
+    }else{
+        SendError(Engine(), L, "lua_GetIdentifiers wrong arguments");
+        return 0;
+    }
+    return 1;
+}
+
 int lua_GetCars(lua_State* L) {
-    int Args = lua_gettop(L);
-    if (Args > 0 && lua_isnumber(L, 1)) {
+    if (lua_isnumber(L, 1)) {
         int ID = int(lua_tonumber(L, 1));
         auto MaybeClient = GetClient(Engine().Server(), ID);
         if (MaybeClient && !MaybeClient.value().expired()) {
@@ -344,7 +365,7 @@ int lua_GetCars(lua_State* L) {
         } else
             return 0;
     } else {
-        SendError(Engine(), L, ("GetPlayerVehicles not enough arguments"));
+        SendError(Engine(), L, ("GetPlayerVehicles wrong arguments"));
         return 0;
     }
     return 1;
@@ -638,9 +659,11 @@ std::any CallFunction(TLuaFile* lua, const std::string& FuncName, std::shared_pt
     ClearStack(luaState);
     return 0;
 }
+
 void TLuaFile::SetPluginName(const std::string& Name) {
     mPluginName = Name;
 }
+
 void TLuaFile::SetFileName(const std::string& Name) {
     mFileName = Name;
 }
@@ -648,6 +671,7 @@ void TLuaFile::SetFileName(const std::string& Name) {
 void TLuaFile::Load() {
     Assert(mLuaState);
     luaL_openlibs(mLuaState);
+    lua_register(mLuaState, "GetPlayerIdentifiers", lua_GetIdentifiers);
     lua_register(mLuaState, "TriggerGlobalEvent", lua_TriggerEventG);
     lua_register(mLuaState, "TriggerLocalEvent", lua_TriggerEventL);
     lua_register(mLuaState, "TriggerClientEvent", lua_RemoteEvent);
diff --git a/src/TServer.cpp b/src/TServer.cpp
index d819f37..b91b7cd 100644
--- a/src/TServer.cpp
+++ b/src/TServer.cpp
@@ -8,10 +8,14 @@
 #include <any>
 #include <sstream>
 
+#undef GetObject //Fixes Windows
+
 #include "rapidjson/document.h"
 #include "rapidjson/stringbuffer.h"
 #include "rapidjson/writer.h"
 
+
+
 namespace json = rapidjson;
 
 TServer::TServer(int argc, char** argv) {
diff --git a/src/TTCPServer.cpp b/src/TTCPServer.cpp
index 0c32091..c78a195 100644
--- a/src/TTCPServer.cpp
+++ b/src/TTCPServer.cpp
@@ -7,6 +7,8 @@
 #include <Http.h>
 #include <cstring>
 
+#undef GetObject //Fixes Windows
+
 #include "rapidjson/document.h"
 #include "rapidjson/stringbuffer.h"
 #include "rapidjson/writer.h"
@@ -102,10 +104,15 @@ void TTCPServer::Authentication(SOCKET TCPSock) {
         return;
     }
 
-    if (AuthResponse["username"].IsString() && AuthResponse["roles"].IsString() && AuthResponse["guest"].IsBool()) {
+    if (AuthResponse["username"].IsString() && AuthResponse["roles"].IsString()
+        && AuthResponse["guest"].IsBool() && AuthResponse["identifiers"].IsArray()) {
+
         Client->SetName(AuthResponse["username"].GetString());
         Client->SetRoles(AuthResponse["roles"].GetString());
         Client->SetIsGuest(AuthResponse["guest"].GetBool());
+        for(const auto& ID : AuthResponse["identifiers"].GetArray()){
+            Client->AddIdentifier(ID.GetString());
+        }
     } else {
         ClientKick(*Client, "Invalid authentication data!");
         return;