Update pytest_plugin with fixtures to test auth in core and extensions

[akshaychitneni]

Fixes #773

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[codecov-commenter]

Codecov Report

Merging #956 (08663bb) into main (cc7e6c4) will increase coverage by 0.16%.
The diff coverage is 92.75%.

❗ Current head 08663bb differs from pull request most recent head 3550405. Consider uploading reports for the commit 3550405 to get more accurate results

@@            Coverage Diff             @@
##             main     #956      +/-   ##
==========================================
+ Coverage   72.07%   72.24%   +0.16%     
==========================================
  Files          64       64              
  Lines        8031     8098      +67     
  Branches     1340     1353      +13     
==========================================
+ Hits         5788     5850      +62     
- Misses       1837     1838       +1     
- Partials      406      410       +4     

Impacted Files	Coverage Δ
jupyter_server/pytest_plugin.py	89.23% <92.75%> (+1.00%)	⬆️

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[blink1073]

Nice, thanks @akshaychitneni!

[Zsailer]

Should this be removed? 😉

[Zsailer]

Thanks @akshaychitneni! Just a minor comment inline. Otherwise this looks good!

[akshaychitneni]

Thanks @akshaychitneni! Just a minor comment inline. Otherwise this looks good!

Thanks @Zsailer. Updated.

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