test: improve auth test coverage

[jescalada]

Builds on top of #963, to improve test coverage for auth methods.

[netlify]

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Name	Link
🔨 Latest commit	4d742f6
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[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.

Project coverage is 71.62%. Comparing base (d13686d) to head (4d742f6).

Files with missing lines	Patch %	Lines
src/service/passport/activeDirectory.js	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1024      +/-   ##
==========================================
+ Coverage   69.51%   71.62%   +2.11%     
==========================================
  Files          54       54              
  Lines        2227     2224       -3     
  Branches      248      248              
==========================================
+ Hits         1548     1593      +45     
+ Misses        648      600      -48     
  Partials       31       31              

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[JamieSlome]

@jescalada - can you look at the merge conflict here? This was a change by @06kellyjac I believe 🤝

[jescalada]

@JamieSlome This should be ready to go! Just had a minor issue with a test failing due to changes in error handling in the AD auth file.