Enable EKP struct as input arg for initialize

[nefrathenrici]

Closes #105

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.04%. Comparing base (4232948) to head (57288cf).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #112      +/-   ##
==========================================
+ Coverage   27.42%   28.04%   +0.61%     
==========================================
  Files           8        8              
  Lines         350      353       +3     
==========================================
+ Hits           96       99       +3     
  Misses        254      254              

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