fix: the problem of pydantic

typings/group.py

@@ -1,7 +1,6 @@
 from typing import Optional
 from pydantic import BaseModel, Field
 from enum import Enum
-from typings.user import UserPosition
 from bson import ObjectId
 
 
@@ -11,6 +10,16 @@ class GroupType(str, Enum):
     group = "group"
 
 
+class UserPosition(str, Enum):
+    student = "student"
+    secretary = "secretary"
+    department = "department"
+    auditor = "auditor"
+    admin = "admin"
+    system = "system"
+
+
+
 class Group(BaseModel):
     _id: ObjectId | str
     name: str