fix authenticated_no_key (1.2-maint)

[ThomasWaldmann]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 82.39%. Comparing base (dfab51d) to head (b07add6).
Report is 5 commits behind head on 1.2-maint.

Files with missing lines	Patch %	Lines
src/borg/crypto/key.py	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##           1.2-maint    #8402      +/-   ##
=============================================
- Coverage      82.67%   82.39%   -0.28%     
=============================================
  Files             38       38              
  Lines          10837    10839       +2     
  Branches        2079     2080       +1     
=============================================
- Hits            8959     8931      -28     
- Misses          1327     1352      +25     
- Partials         551      556       +5     

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