Documented way to look into inward tokens and results of lookup in userInfo endpoint

[arymkus]

Documented way to look into inward tokens or results of lookup in userInfo endpoint

#478

Testing done

No tests required, only documentation update.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.73%. Comparing base (84359ac) to head (0b8fed9).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #479   +/-   ##
=========================================
  Coverage     71.73%   71.73%           
  Complexity      222      222           
=========================================
  Files            17       17           
  Lines          1033     1033           
  Branches        148      148           
=========================================
  Hits            741      741           
  Misses          201      201           
  Partials         91       91           

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[jtnord]

This looks good, but could potentially leak sensitive information unencrypted on disk.

Perhaps worth mentioning in an admonition that this should be used for a unique test account that should be removed after setup, or only enabled for a short time and log files deleted

[jtnord]

Most common Idps do document this somewhere.
Perhaps it would be worth creating a table of common values for well known Idps