mask password from openvpn clients in debug logs. (user password from SSO accounts not affected)

[jkroepke]

What this PR does / why we need it

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

• fixes When logs are a DEBUG level we can observe user password in logs. #414

Special notes for your reviewer

Particularly user-facing changes

Checklist

Complete these before marking the PR as ready to review:

• DCO signed
• The PR title has a summary of the changes
• The PR body has a summary to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.07%. Comparing base (4b51d04) to head (bcf68d2).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #416   +/-   ##
=======================================
  Coverage   83.07%   83.07%           
=======================================
  Files          50       50           
  Lines        2889     2889           
=======================================
  Hits         2400     2400           
  Misses        372      372           
  Partials      117      117           

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