Improve code coverage

[mawassk]

No description provided.

[codecov]

Codecov Report

Merging #8 (a19a14d) into main (6f5c6aa) will increase coverage by 2.17%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main       #8      +/-   ##
==========================================
+ Coverage   92.73%   94.91%   +2.17%     
==========================================
  Files           7        7              
  Lines         179      177       -2     
==========================================
+ Hits          166      168       +2     
+ Misses         13        9       -4     

Impacted Files	Coverage Δ
ninja_apikey/admin.py	100.00% <ø> (+12.00%)	⬆️
ninja_apikey/tests.py	100.00% <100.00%> (ø)
ninja_apikey/models.py	100.00% <0.00%> (+4.16%)	⬆️

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