Function get_course_page_with_user_data_from_selected_page

pub async fn get_course_page_with_user_data_from_selected_page(
    conn: &mut PgConnection,
    user_id: Option<Uuid>,
    page: Page,
    was_redirected: bool,
    is_test_mode: bool,
) -> ModelResult<CoursePageWithUserData>