fix(admin): auth middleware body query check

[kon14]

Fixes query param check failing for REST requests containing a query body param.

What kind of change does this PR introduce?

• [X] Bugfix
• [ ] Feature
• [ ] Code style update
• [ ] Refactor
• [ ] Build-related changes
• [ ] Other (please describe)

Does this PR introduce a breaking change?

• [ ] Yes
• [X] No

The PR fulfills these requirements:

• [X] It's submitted to the main branch
• [ ] When resolving a specific issue, it's referenced in the PR's description (e.g. fix #xxx, where "xxx" is the issue number)