@db_session
def remove_feed_from_user(user_id: int, channel_id: str) -> bool:
    u = User.get(user_id=user_id)
    if u is None:
        return False
    f = Feed.get(channel_id=channel_id)
    if f is None:
        return False
    # u.feeds.remove(f)
    f.delete()
    return True