fix: validate JWT signed other implemenation

[lukasjhan]

I added private field in JWT class. It is set when we created JWT instance from encoded.
And I created getUnsignedToken method to use encoded jwt string when it is existed.

It close #157

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.03%. Comparing base (d9eaf44) to head (982a06a).

Additional details and impacted files

@@            Coverage Diff             @@
##             next     #158      +/-   ##
==========================================
+ Coverage   97.81%   98.03%   +0.21%     
==========================================
  Files          23       23              
  Lines        2062     2082      +20     
  Branches      295      307      +12     
==========================================
+ Hits         2017     2041      +24     
+ Misses         45       41       -4     

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[cre8]

@lukasjhan code looks good, can you add missing tests before merging?

[lukasjhan]

Okay :) I'm working on it

[c2bo]

error - 2024-03-11 13:57:57,128 -- Commit creating failed: {"detail":"Tokenless has reached GitHub rate limit. Please upload using a token: https://docs.codecov.com/docs/adding-the-codecov-token. Expected available in 545 seconds."}
Error: Codecov: Failed to properly create commit: The process '/home/runner/work/_actions/codecov/codecov-action/v4/dist/codecov' failed with exit code 1

[lukasjhan]

error - 2024-03-11 13:57:57,128 -- Commit creating failed: {"detail":"Tokenless has reached GitHub rate limit. Please upload using a token: https://docs.codecov.com/docs/adding-the-codecov-token. Expected available in 545 seconds."}
Error: Codecov: Failed to properly create commit: The process '/home/runner/work/_actions/codecov/codecov-action/v4/dist/codecov' failed with exit code 1

There is a token. It's strange. We're trying to find out why.