diff --git a/src/Script.hpp b/src/Script.hpp
index f29a3ca..aa776e6 100644
--- a/src/Script.hpp
+++ b/src/Script.hpp
@@ -23,13 +23,15 @@ namespace Porygon{
         shared_ptr<Binder::BoundScriptStatement> _boundScript;
         shared_ptr<const ScriptType> _returnType = nullptr;
         ScriptOptions* _scriptOptions;
+    public:
+        shared_ptr<Diagnostics::DiagnosticsHolder> Diagnostics;
+    private:
         std::string _treeString;
 
         explicit Script(const u16string&, ScriptOptions*);
         Script(shared_ptr<BoundScriptStatement> boundScript, shared_ptr<Diagnostics::DiagnosticsHolder> diagnostics);
         void Parse(const u16string& script);
     public:
-        shared_ptr<Diagnostics::DiagnosticsHolder> Diagnostics;
 
         static Script* Create(const u16string& script, ScriptOptions* = nullptr);
         static Script* Create(const string& script, ScriptOptions* = nullptr);
diff --git a/src/StandardLibraries/MathLibrary.hpp b/src/StandardLibraries/MathLibrary.hpp
index 4fb3981..cedbe73 100644
--- a/src/StandardLibraries/MathLibrary.hpp
+++ b/src/StandardLibraries/MathLibrary.hpp
@@ -158,7 +158,7 @@ namespace Porygon::StandardLibraries {
 
     public:
         static UserData::UserData* CreateUserData(){
-            return new UserData::UserData({
+            return new UserData::UserData(new Utilities::HashedString(new u16string(u"__math__")), {
                 {
                     HashedString::ConstHash("abs"),
                  new UserData::UserDataField(
diff --git a/src/UserData/RetrievedUserData.hpp b/src/UserData/RetrievedUserData.hpp
index 23a4cff..d04fe51 100644
--- a/src/UserData/RetrievedUserData.hpp
+++ b/src/UserData/RetrievedUserData.hpp
@@ -8,12 +8,12 @@ namespace Porygon::UserData{
         UserData* _ud;
         uint32_t _key;
     public:
-        explicit RetrievedUserData(UserData* ud) : _ud(ud), _key(0){}
+        explicit RetrievedUserData(UserData* ud) : _ud(ud), _key(ud->GetIdentifier()->GetHash()){}
         explicit RetrievedUserData(uint32_t id) : _ud(nullptr), _key(id){}
 
         UserData * Get();
 
-        inline uint32_t GetKey() const{
+        [[nodiscard]] inline uint32_t GetKey() const{
             return _key;
         }
     };
diff --git a/src/UserData/UserData.cpp b/src/UserData/UserData.cpp
index 6f8e0dc..11ee37d 100644
--- a/src/UserData/UserData.cpp
+++ b/src/UserData/UserData.cpp
@@ -4,9 +4,10 @@
 
 namespace Porygon::UserData {
     extern "C" {
-    void RegisterUserDataType(uint32_t id) {
-        auto ud = new UserData({});
-        UserDataStorage::RegisterType(id, ud);
+    void RegisterUserDataType(char16_t * key) {
+        auto hashedKey = new Utilities::HashedString(new u16string(key));
+        auto ud = new UserData(hashedKey, {});
+        UserDataStorage::RegisterType(hashedKey->GetHash(), ud);
     }
 
     void RegisterUserDataField(uint32_t typeId, uint32_t fieldId, UserDataField *field) {
diff --git a/src/UserData/UserData.hpp b/src/UserData/UserData.hpp
index 5aa1325..86ff499 100644
--- a/src/UserData/UserData.hpp
+++ b/src/UserData/UserData.hpp
@@ -9,6 +9,7 @@
 
 namespace Porygon::UserData {
     class UserData {
+        Utilities::HashedString* _hashedString;
         std::unordered_map<uint32_t, unique_ptr<UserDataField>> _fields;
         std::mutex _mutex;
 
@@ -31,7 +32,8 @@ namespace Porygon::UserData {
         Evaluation::EvalValue* (*_cast)(void* obj, const ScriptType* castType);
 
     public:
-        explicit UserData(const std::unordered_map<uint32_t, UserDataField *>& fields)
+        explicit UserData(Utilities::HashedString* hashedString, const std::unordered_map<uint32_t, UserDataField *>& fields)
+            : _hashedString(hashedString), _isCastable(nullptr), _cast(nullptr)
         {
             for (auto f: fields){
                 _fields.insert({f.first, unique_ptr<UserDataField>(f.second)});
@@ -54,6 +56,12 @@ namespace Porygon::UserData {
             delete _logicalAnd;
             delete _logicalOr;
             delete _concatenation;
+
+            delete _hashedString;
+        }
+
+        Utilities::HashedString* GetIdentifier(){
+            return _hashedString;
         }
 
         [[nodiscard]]
diff --git a/src/UserData/UserDataScriptType.hpp b/src/UserData/UserDataScriptType.hpp
index 67ea7c7..dc22f19 100644
--- a/src/UserData/UserDataScriptType.hpp
+++ b/src/UserData/UserDataScriptType.hpp
@@ -65,6 +65,12 @@ namespace Porygon::UserData {
             }
             return CastResult ::InvalidCast;
         }
+
+        [[nodiscard]] string ToString() const override {
+            std::stringstream s;
+            s << ScriptType::ToString() << " (" << _userData->Get()->GetIdentifier()->GetDebugString() << ")";
+            return s.str();
+        }
     };
 }
 
diff --git a/src/UserData/UserDataTemplates.hpp b/src/UserData/UserDataTemplates.hpp
index f5e7c17..b1f9892 100644
--- a/src/UserData/UserDataTemplates.hpp
+++ b/src/UserData/UserDataTemplates.hpp
@@ -1,14 +1,20 @@
 #ifndef PORYGONLANG_USERDATATEMPLATES_HPP
 #define PORYGONLANG_USERDATATEMPLATES_HPP
 
+static std::wstring_convert<std::codecvt_utf8_utf16<char16_t, 0x10ffff, std::little_endian>, char16_t> to_16;
+Porygon::Utilities::HashedString* Convert(const char* k){
+    auto conv = new u16string(to_16.from_bytes(k));
+    return new Porygon::Utilities::HashedString(conv);
+}
 /*!
 \brief Begins creating an invokable function. Make sure to call PORYGON_USERDATA_END after this.
 \returns The start of an invokable function with the name __createUserData. This can be called to return a userdata object.
 */
-#define PORYGON_USERDATA_START(type) \
+#define PORYGON_USERDATA_START(key, type) \
     using T_USERDATA = type; \
     static Porygon::UserData::UserData* __createUserData(){ \
-        return new Porygon::UserData::UserData({ \
+        return new Porygon::UserData::UserData( \
+        Convert(#key), { \
 
 /*!
 \brief Ends creation of invokable function to create userdata.
@@ -20,8 +26,8 @@
 \param fields The fields of the object.
 \returns an invokable static function with the name __createUserData. This can be called to generate a userdata object.
 */
-#define PORYGON_USERDATA(type, fields) \
-    PORYGON_USERDATA_START(type) \
+#define PORYGON_USERDATA(key, type, fields) \
+    PORYGON_USERDATA_START(key, type) \
     fields \
     PORYGON_USERDATA_END()
 
diff --git a/tests/integration/UserDataTests.cpp b/tests/integration/UserDataTests.cpp
index 7b695cd..47c4345 100644
--- a/tests/integration/UserDataTests.cpp
+++ b/tests/integration/UserDataTests.cpp
@@ -40,7 +40,7 @@ private:
     }
 
 public:
-    PORYGON_USERDATA(UserDataTestObject,
+    PORYGON_USERDATA(testObject, UserDataTestObject,
         PORYGON_INTEGER_FIELD(foo)
         PORYGON_READONLY_INTEGER_FIELD(readonly)
         PORYGON_INTEGER_FUNCTION(getFoo)