Add section about UI 2FA accounts not working

[dhenry437]

Add section about UI 2FA accounts not working

Proposed change

I had to create a local account for the UI widget to work, Synology Disk Station had a similar section so I thought I'd add one.

Moreover the existing line about using a local account was easy to miss

Type of change

• New service widget
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation only
• Other (please explain)

Checklist:

• If applicable, I have added corresponding documentation changes.
• If applicable, I have reviewed the feature and / or service widget guidelines.
• I have checked that all code style checks pass using pre-commit hooks and linting checks.
• If applicable, I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.

[shamoon]

We try to keep our docs concise. In particular we like to avoid steps that describe navigating someone else’s UI. Making the local account more noticeable would be acceptable for a PR, but not as-is

Thanks

[dhenry437]

Created new pull request 4290 with the requested changes, just of note the Synology Disk Station widget docs describe a 3rd party UI.