Hey @Sylvain!
Yes, from what you've described this should be possible. When you're using query.trigger() it actually returns a promise so you can write, for instance:
const dataPassbase = await getAllPassbaseUsers.trigger({});
And then the dataPassbase variable should contain whatever value gets stored it getAllPAssbaseUsers.data once the query completes.
You should also be able to run this JS query on page load (by selecting the corresponding option in the Advanced settings).
Finally, check out this post on running a query for each item in an array!
Hopefully those three things are able to get you started here but please post again if you run into any trouble 