refactor remove pydantic

src/user_signup_session.py

@@ -1,20 +1,20 @@
+from dataclasses import dataclass
 from uuid import UUID
-
-from pydantic import BaseModel
-
+import numpy as np
 from src.user_keypad import UserKeypad
 from src.models import KeypadSize
+from typing import Optional
 
-
-class UserSignupSession(BaseModel):
+@dataclass
+class UserSignupSession:
     session_id: UUID
     customer_id: UUID
     login_keypad: UserKeypad
     keypad_size: KeypadSize
-    set_keypad: list[int] | None = None
-    confirm_keypad: list[int] | None = None
-    set_key_entry: list[int] | None = None
-    username: str | None = None
+    set_keypad: Optional[np.ndarray] = None
+    confirm_keypad: Optional[np.ndarray] = None
+    set_key_entry: Optional[np.ndarray] = None
+    username: Optional[str] = None
 
     def deduce_passcode(self, confirm_key_entry: list[int]) -> list[int]:
         if not all(0 <= key <= self.keypad_size.numb_of_keys for key in confirm_key_entry):