Crash on filter `unique` for pointer

[mtrezza]

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest versions of Parse Server and Parse Dashboard.

Issue Description

Dashboard crashes when setting a filter unique for a field of type Pointer.

Steps to reproduce

1. Open class with Pointer field in data browser.
2. Set filter unique on Pointer field.
3. Dashboard crashes.

Environment

Dashboard

• Parse Dashboard version: 6.0.0-alpha.28

Logs

TypeError: l.get is not a function. (In 'l.get("username")', 'l.get' is undefined)

[parse-github-assistant]

Thanks for opening this issue!

• 🚀 You can help us to fix this issue faster by opening a pull request with a failing test. See our Contribution Guide for how to make a pull request, or read our New Contributor's Guide if this is your first time contributing.

[RaghavArora14]

Hi can i work on this?

[parseplatformorg]

🎉 This change has been released in version 6.1.1-alpha.1

[parseplatformorg]

🎉 This change has been released in version 6.2.0