public function define_trigger() {
		// global automator object.

		// setup trigger configuration.
		$trigger = array(
			'author'              => Automator()->get_author_name( $this->trigger_code ),
			'support_link'        => Automator()->get_author_support_link( $this->trigger_code, 'integration/tutor-lms/' ),
			'integration'         => self::$integration,
			'code'                => $this->trigger_code,
			/* translators: Logged-in trigger - TutorLMS */
			'sentence'            => sprintf( esc_attr__( 'A user fails {{a quiz:%1$s}} {{a number of:%2$s}} time(s)', 'uncanny-automator' ), $this->trigger_meta, 'NUMTIMES' ),
			/* translators: Logged-in trigger - TutorLMS */
			'select_option_name'  => esc_attr__( 'A user fails {{a quiz}}', 'uncanny-automator' ),
			'action'              => 'tutor_quiz/attempt_ended',
			'priority'            => 10,
			'accepted_args'       => 1,
			'validation_function' => array( $this, 'failed' ),
			// very last call in WP, we need to make sure they viewed the page and didn't skip before is was fully viewable
			'options'             => [
				Automator()->helpers->recipe->tutorlms->options->all_tutorlms_quizzes( null, $this->trigger_meta, true ),
				Automator()->helpers->recipe->options->number_of_times(),
			],
		);
		Automator()->register->trigger( $trigger );
	}