Function headless_lms_models::course_module_completions::get_all_by_course_instance_and_user_id

pub async fn get_all_by_course_instance_and_user_id(
    conn: &mut PgConnection,
    course_instance_id: Uuid,
    user_id: Uuid
) -> ModelResult<Vec<CourseModuleCompletion>>

Gets all module completions for the user on a single course instance. There can be multiple modules in a single course, so the result is a Vec.