Discourse 使用 DiscourseConnect 调用接口 admin/users/sync_sso 422 错误

{"failed":"FAILED","message":"The `external_id` is required but was blank"}

URIBuilder builder = new URIBuilder();
            builder.addParameter("external_id", "1");
            builder.addParameter("email", "info@isharkfly.com");
            builder.addParameter("username", "info.visafn.sso");
//            builder.addParameter("add_groups", "bar");
            builder.addParameter("require_activation", "false");
            url = builder.build().toString();

?external_id=1&email=info%40isharkfly.com&username=info.visafn.sso&require_activation=false

url = StringUtils.removeStart(builder.build().toString(),"?");