public function update_callback( $value, $object, $key ) {

		if ( ! current_user_can( 'edit_post', $object->ID ) ) {
			return new WP_Error(
				'rest_cannot_update',
				__( 'Sorry, you are not allowed to edit the object instructors.', 'lifterlms' ),
				array(
					'key'    => $key,
					'status' => rest_authorization_required_code(),
				)
			);
		}

		$value = json_decode( $value, true );

		$obj = llms_get_post( $object );
		if ( $obj ) {
			$obj->instructors()->set_instructors( $value );
		}

		return null;
	}