def METHOD_NAME(self):
    """
    Returns the custom LTICourseContext id as provided by LTI
    throws: KeyError or ValueError or LTICourseContext.DoesNotExist
    :return: context -- the LTICourseContext instance or None
    """
    return LTICourseContext.objects.get(
        enable=True,
        uuid=self.lti_params['custom_course_context'])