diff --git a/src/MarcSync/Errors/Authorization.lua b/src/MarcSync/Errors/Authorization.lua
new file mode 100644
index 0000000..cfb685d
--- /dev/null
+++ b/src/MarcSync/Errors/Authorization.lua
@@ -0,0 +1,5 @@
+return {
+    InvalidAccessToken = function(message: string):string
+        return ("[MarcSync Exception] InvalidAccessToken: %s"):format(message)
+    end
+}
\ No newline at end of file
diff --git a/src/MarcSync/Errors/Collection.lua b/src/MarcSync/Errors/Collection.lua
new file mode 100644
index 0000000..c59ddde
--- /dev/null
+++ b/src/MarcSync/Errors/Collection.lua
@@ -0,0 +1,8 @@
+return {
+    CollectionNotFound = function(message: string):string
+        return ("[MarcSync Exception] CollectionNotFound: %s"):format(message)
+    end,
+    CollectionAlreadyExists = function(message: string):string
+        return ("[MarcSync Exception] CollectionAlreadyExists: %s"):format(message)
+    end
+}
\ No newline at end of file
diff --git a/src/MarcSync/Errors/Entry.lua b/src/MarcSync/Errors/Entry.lua
new file mode 100644
index 0000000..5d51edb
--- /dev/null
+++ b/src/MarcSync/Errors/Entry.lua
@@ -0,0 +1,8 @@
+return {
+    InvalidEntryData = function(message: string):string
+        return ("[MarcSync Exception] InvalidEntryData: %s"):format(message)
+    end,
+    EntryNotFound = function(message: string):string
+        return ("[MarcSync Exception] EntryNotFound: %s"):format(message)
+    end
+}
\ No newline at end of file
diff --git a/src/MarcSync/Types/EntryData.lua b/src/MarcSync/Types/EntryData.lua
new file mode 100644
index 0000000..c9f8aa1
--- /dev/null
+++ b/src/MarcSync/Types/EntryData.lua
@@ -0,0 +1,9 @@
+type EntryData = {
+    [string]: any
+}
+
+return {
+    getType = function(): EntryData
+        return {}
+    end,
+}
\ No newline at end of file
diff --git a/src/MarcSync/Types/MARCSYNC_COLLECTION.lua b/src/MarcSync/Types/MARCSYNC_COLLECTION.lua
deleted file mode 100644
index a1f19fd..0000000
--- a/src/MarcSync/Types/MARCSYNC_COLLECTION.lua
+++ /dev/null
@@ -1 +0,0 @@
-return require(script.Parent.Parent.Parent.Objects.Collection)
\ No newline at end of file
diff --git a/src/MarcSync/Types/MARCSYNC_ENTRY.lua b/src/MarcSync/Types/MARCSYNC_ENTRY.lua
deleted file mode 100644
index 04ee486..0000000
--- a/src/MarcSync/Types/MARCSYNC_ENTRY.lua
+++ /dev/null
@@ -1 +0,0 @@
-return require(script.Parent.Parent.Parent.Objects.Entry)
\ No newline at end of file
diff --git a/src/MarcSync/Types/MARCSYNC_UTILS.lua b/src/MarcSync/Types/MARCSYNC_UTILS.lua
deleted file mode 100644
index 03630f8..0000000
--- a/src/MarcSync/Types/MARCSYNC_UTILS.lua
+++ /dev/null
@@ -1 +0,0 @@
-return require(script.Parent.Parent)
\ No newline at end of file