Bulk invite users, make sure ass_scan_ds test fails on error

[lvgelder]

No description provided.

[dbechrd]

Why are we changing associate_scan_dataset.ts in this commit? Seems unrelated. Did you notice a bug while working on bulk user invites, or is that a leftover diff that slipped in accidentally?

[lvgelder]

Why are we changing associate_scan_dataset.ts in this commit? Seems unrelated. Did you notice a bug while working on bulk user invites, or is that a leftover diff that slipped in accidentally?

I noticed a bug while working on it. It can be a separate commit.

[ksgerst]

@lvgelder - I recently added this similar method: 4e63414

As I mentioned in standup, I found some weirdness when trying to write a test using FormData and Blob without a browser. I did some research and found the below stackoverflow link, but we do need to come up with a testing strategy for these in this library.
https://stackoverflow.com/questions/63576988/how-to-use-formdata-in-node-js-without-browser