Fix extra_body key in API response call

[JFolberth]

Purpose

Discovered section of code that didn't work. agent parameter was updated to agent_reference

• ...

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code
  Rerun the lab.

What to Check

Verify that the following are valid:

• ...

Other Information