[Python] FastAPI_Login RedirectResponse after authorization fails

I have a simple login form that is opened using a GET request, and the user submits the form with a POST request. After successful authentication, I redirect the user to the main page of my web application using a RedirectResponse object.

However, despite the successful redirection, the user is not authorized on the main page, as if the authentication cookie was not set. There are no error messages displayed.

Here's the code for my login route:

@router.post('/login')
def login(response: Response,
data: OAuth2PasswordRequestForm = Depends(),
db: Session = Depends(get_db)):
email = data.username
password = data.password

user = db.query(DbUser).filter(DbUser.email == email).first()

if not user:
# you can return any response or error of your choice
raise InvalidCredentialsException

if not Hash.verify(user.password, password):
raise HTTPException(status_code=status.HTTP_404_NOT_FOUND,
detail='Incorrect password')

token = manager.create_access_token(
data={'sub': email}
)
resp = RedirectResponse(url='/post/stat/all',status_code=status.HTTP_302_FOUND)
manager.set_cookie(response, token)
return resp


However, if I change resp = RedirectResponse(... to resp = 'ok', then everything works fine—just without a URL redirection.

Tried also with no luck:

return templates.TemplateResponse("/login/success.html",{"request": request})


What would the issue be and the way to fix it?

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