Pyramid Authentication remember() header returns Attribute Error 'Nonetype' Object has no attribute USER_ID

Question

I am trying to use Pyramid to create a log in system with a composite key. So there is a database with two tables, one for the customer with a customer id and company related information, and then another table with a completely unique username ([email protected]), USER_ID, and user related information plus permissions. Every user will belong to a company so the customer id is a composite key.

In my login view, I have this:

    from pyramid.security import (
        remember,
        forget,
    )
    #other imports
    .
    .
    .
    @view_config(route_name='login_en', renderer='../templates/login-en.jinja2')
    def login(request):
    next_url = request.route_url('main_en')
    message = ''
    login = ''
    if(request.method == 'POST'):
        login = request.params['login'] #This is the html element for the username
        password = request.params['password'] #Password
        user = (
            request.dbsession.query(models.CustomerUsers)
            .filter_by(USERNAME_EMAIL=login)
            .first() #Find user in db
        )
        if user is not None and user.check_password(password): #If user is in db
            headers = remember(request, user.USER_ID) #remember them
            return HTTPFound(location=next_url, headers=headers) #redirect them
        message = 'Failed login' #bad credentials
        request.response.status = 400

    return dict(
        message=message,
        url=request.route_url('login_en'),
        next_url=next_url,
        login=login,
    )

And this is functional in the sense that bad credentials produce failed login, and good credentials redirect. The problem is that when trying to render main_en an internal server is generated that says:

  File "/usr/home/iot/frameworks/mywebapp/env/lib/python3.9/site-packages/mywebapp/views/default.py", line 20, in main_en
    user_id = request.user.USER_ID
AttributeError: 'NoneType' object has no attribute 'USER_ID'

The main_en view looks like this

@view_config(route_name='main_en', renderer='../templates/main-en.jinja2')
def main_en(request):
    user_id = request.user.USER_ID #get their id
    if user_id is None: #they are not authenticated
        raise HTTPForbidden #HTTPForbidden view is defined afterwards
    message = '' #otherwise display the page
    return dict(message=message)

I am confused about why headers = remember(request, user.USER_ID) is not passing the user information to the next url. Since it redirects only on good credentials, user and USER_ID definitely aren't none. So my question is am I using remember() incorrectly? Why is it either returning Nonetype to the header and/or not remembering when it redirects?