log before adding agents - fixes issue #252

[glynnbird]

Overview

Fixes auth scrubbing bug where JSON.stringify on the req object could produce circular references when an HTTP Agent was used.

Solution: log before adding the agent.

Testing recommendations

npm run test

GitHub issue number

Fixes issue #252

Checklist

• [x] Code is written and works correctly;
• [x] Changes are covered by tests;
• [x] Documentation reflects the changes;