[Python] Redirect to login page if user not logged in using FastAPI-Login package

I would like to redirect users to the login page, when they are not logged in.

Here is my code:

from fastapi import (
Depends,
FastAPI,
HTTPException,
status,
Body,
Request
)
from fastapi.encoders import jsonable_encoder
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from fastapi.responses import HTMLResponse, RedirectResponse
import app.models as models
import app.database as database
from datetime import datetime, timedelta
from jose import JWTError, jwt
from starlette.responses import FileResponse
from fastapi_login import LoginManager
from fastapi_login.exceptions import InvalidCredentialsException
from fastapi import Cookie
import re

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
manager = LoginManager(SECRET_KEY, token_url="/auth/login", use_cookie=True)
manager.cookie_name = "token"


@app.get("/")
@app.get("/item")
async def read_index(user=Depends(manager)):
try:
return FileResponse('item.html')
except status.HTTP_401_UNAUTHORIZED:
return RedirectResponse(url="/login", status_code=status.HTTP_302_FOUND)


However, when I access this page: localhost:8000/item, I get the following:

{"detail":"Not authenticated"}

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