Import from Commentario marks all unknown users as SSO
I recently created a new Commentario domain and imported a bunch of comments using the Commentario format. All the new users that were created from this import were marked as "SSO", despite not having `"federatedSso:" true` set in the imported JSON. My comment server doesn't support SSO, *and* Commentario forbids new users to sign up with emails that match existing accounts (and doesn't support password recovery for SSO accounts), so this effectively means that everyone who has a comment in the exported data is now forbidden from making new comments.
To reproduce, try importing:
```json
{
"version": 3,
"pages": [],
"comemnts": [],
"commenters": [
{
"colourIndex": 4,
"createdTime": "2024-10-12T22:22:38.063Z",
"email": "example@example.org",
"hasAvatar": false,
"id": "665cbcc5-5409-44d2-a768-2cc203e2a4fc",
"isCommenter": true,
"isModerator": false,
"name": "Example User"
}
]
}
```
to a Commentario instance and note that the user is marked as SSO.
issue