feat: Add token validation helper

[mzaniolo]

Closes: #35

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 13.45%. Comparing base (0795f7d) to head (c7b7074).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
+ Coverage   12.23%   13.45%   +1.21%     
==========================================
  Files         132      133       +1     
  Lines        5164     5240      +76     
==========================================
+ Hits          632      705      +73     
- Misses       4532     4535       +3     

see 3 files with indirect coverage changes

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[nikzen]

I added one more claim

[sirewix]

LGTM, but few small unimportant stylistic suggestions, feel free to discard them

[mzaniolo]

LGTM, but few small unimportant stylistic suggestions, feel free to discard them

Thanks for the comments, I like your style.