Can't use database from my importer

[Fidelix]

First of all, I'm new to NodeJS development. I'm liking it so far (except for a few annoyances here and there).

I am extending development of nodebb-plugin-import-ipboard (forked and will send a PR once it's done) to support a bunch of stuff the current plugin does not currently support, for instance:

• IPB replies which are in a special blockquote format.
• Spoiler blocks
• Mentions
• A few more things...

On my nodebb-plugin-import-ipboard/index.js file, which I'm requiring from a manual test.js file (so it's not running inside NodeBB!), I placed a:
var db = require('nodebb-plugin-import/server/db');

But when I try to use it like this:
var imported_post = db.getObject("_imported_post:1566");
I just get "undefined".
I can see on the debugger variables Redis is loaded (but I don't know if it was loaded correctly.)

I also tried loading data instead of db:
var data = require('nodebb-plugin-import/server/data');
and
var imported_post = data.getImportedPost("1566");

And I just get undefined.
Can someone tell me what I'm doing wrong?