diff --git a/classes/holo_user.py b/classes/holo_user.py
index 308f291..73273be 100644
--- a/classes/holo_user.py
+++ b/classes/holo_user.py
@@ -1,2 +1,14 @@
+from typing import Union
+from pyrogram.types import User, ChatMember
+from modules.database import col_users, col_context, col_warnings, col_subscriptions
+
+class UserNotFoundError(Exception):
+    """HoloUser could not find user with such an ID in database"""
+    def __init__(self, user, user_id):
+        self.user = user
+        self.user_id = user_id
+        super().__init__(f"User of type {type(self.user)} with id {self.user_id} was not found")
+
 class HoloUser():
-    pass
\ No newline at end of file
+    def __init__(self, user: Union[User, ChatMember, int]) -> None:
+        pass
\ No newline at end of file