add check telegram_id and delete old not verefied accounts

app/models/user.py

@@ -22,12 +22,12 @@ class UserInDB(BaseModel):
     is_active: bool = True
     created_at: datetime = datetime.utcnow()
     code: Optional[str] = None
-    telegram_chat_id: Optional[int] = None
     telegram_user_id: Optional[int] = None
     telegram_username: Optional[str] = None
     is_verified: bool = False
     code_expires_at: Optional[datetime] = None
     is_admin: bool = False
+    expires_at: Optional[datetime] = None
 class Session(BaseModel):
     access_token: str
     client_token: str
@@ -37,4 +37,5 @@ class Session(BaseModel):
 class VerifyCode(BaseModel):
     username: str
     code: str
-    telegram_chat_id: int
+    telegram_user_id: int
+    telegram_username: Optional[str] = None

app/services/auth.py

@@ -43,6 +43,7 @@ class AuthService:
             is_verified=False,
             code=None,
             code_expires_at=None,
+            expires_at=datetime.utcnow() + timedelta(hours=1),
             is_admin=False
         )
         await users_collection.insert_one(new_user.dict())
@@ -62,7 +63,6 @@ class AuthService:
         self,
         username: str,
         code: str,
-        telegram_chat_id: int,
         telegram_user_id: int | None = None,
         telegram_username: str | None = None,
         ):
@@ -73,15 +73,26 @@ class AuthService:
         if user["is_verified"]:
             raise HTTPException(400, "User already verified")
 
-        if user.get("telegram_chat_id") and user["telegram_chat_id"] != telegram_chat_id:
+        if user.get("telegram_user_id") and user["telegram_user_id"] != telegram_user_id:
             raise HTTPException(403, "This account is linked to another Telegram")
 
         if user.get("code") != code:
             raise HTTPException(400, "Invalid code")
         
+        if telegram_user_id is not None:
+            existing = await users_collection.find_one({
+                "telegram_user_id": telegram_user_id,
+                "username": {"$ne": username},
+            })
+            if existing:
+                raise HTTPException(
+                    status_code=403,
+                    detail="This Telegram account is already linked to another user",
+                )
+        
         update = {
             "is_verified": True,
-            "telegram_chat_id": telegram_chat_id,
+            "telegram_user_id": telegram_user_id,
             "code": None,
         }
         if telegram_user_id is not None:
@@ -89,7 +100,10 @@ class AuthService:
         if telegram_username is not None:
             update["telegram_username"] = telegram_username
 
-        await users_collection.update_one({"username": username}, {"$set": update})
+        await users_collection.update_one(
+            {"username": username},
+            {"$set": update, "$unset": {"expires_at": ""}},
+        )
         return {"status": "success"}
     
     async def get_verification_status(self, username: str):