fix(auth): allow empty logout endpoint

[nnixaa]

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• [] I read and followed the CONTRIBUTING.md guide.
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Short description of what this resolves:

[codecov]

Codecov Report

Merging #1211 into master will increase coverage by 0.3%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #1211     +/-   ##
=========================================
+ Coverage   79.53%   79.84%   +0.3%     
=========================================
  Files         202      202             
  Lines        6246     6246             
  Branches      495      496      +1     
=========================================
+ Hits         4968     4987     +19     
+ Misses       1162     1144     -18     
+ Partials      116      115      -1

Impacted Files	Coverage Δ
src/framework/auth/strategies/auth-strategy.ts	95.83% <100%> (ø)	⬆️
src/framework/auth/helpers.ts	69.23% <0%> (+1.28%)	⬆️
...work/auth/strategies/password/password-strategy.ts	97.82% <0%> (+2.17%)	⬆️
...heme/components/datepicker/datepicker.component.ts	85.52% <0%> (+2.63%)	⬆️
.../theme/components/datepicker/datepicker-adapter.ts	67.64% <0%> (+2.94%)	⬆️
...heme/components/datepicker/datepicker.directive.ts	73.58% <0%> (+10.37%)	⬆️