return rest_ensure_response( $response );

	}

	/**
	 * Check enrollment existence.
	 *
	 * @since 1.0.0-beta.1
	 * @since 1.0.0-beta.10 Added the `trigger` param.
	 * @since 1.0.0-beta.26 By default don't load the current user if a falsy student ID is supplied.
	 *
	 * @param int     $student_id Student ID.
	 * @param int     $post_id    The course/membership ID.
	 * @param string  $trigger    Optional. The enrollment trigger. Default 'any'.
	 * @param boolean $wp_error   Optional. Whether return a WP_Error instance or a boolean. Default true (returns WP_Error).
	 * @return WP_Error|boolean
	 */
	protected function enrollment_exists( $student_id, $post_id, $trigger = 'any', $wp_error = true ) {

		$student = llms_get_student( $student_id, false );