doc: logging and authentication

[nestoracunablanco]

Documents the credentials leakage fix.

[nestoracunablanco]

Issue #380

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.69%. Comparing base (233ff7c) to head (6b67acf). Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #398      +/-   ##
==========================================
+ Coverage   85.07%   88.69%   +3.62%     
==========================================
  Files           9        9              
  Lines         469      469              
  Branches      117       47      -70     
==========================================
+ Hits          399      416      +17     
+ Misses         65       51      -14     
+ Partials        5        2       -3     

Flag	Coverage Δ
acceptance	85.07% <ø> (ø)
unit	59.91% <ø> (?)

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[nestoracunablanco]

@lucagiove what do you think?