Change the specified user's password

    :param user: The user to change_password
    :param password: The unhashed new password

def change_user_password(user, password):
    """Change the specified user's password

    :param user: The user to change_password
    :param password: The unhashed new password
    """
    user.password = hash_password(password)
    _datastore.put(user)
    send_password_changed_notice(user)
    password_changed.send(current_app._get_current_object(),
                          user=user)