private function register_fields_for_certificate_awards() {

		register_rest_field(
			'llms_my_certificate',
			'certificate_template',
			array(
				'schema'          => array(
					'description' => __( 'Certificate template ID.', 'lifterlms' ),
					'type'        => 'integer',
					'arg_options' => array(
						'validate_callback' => function( $value ) {
							return ! $value || 'llms_certificate' === get_post_type( $value );
						},
					),
				),
				'get_callback'    => function( $object ) {
					return wp_get_post_parent_id( $object['id'] );
				},
				'update_callback' => function( $value, $post ) {
					$update = array(
						'ID'          => $post->ID,
						'post_parent' => $value,
					);
					return wp_update_post( $update );
				},
			)
		);

	}