Expand authorization to include Readonly role for share-token API

[ludeknovy]

ludeknovy/jtl-reporter#310

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.56%. Comparing base (44adcde) to head (b07a5f5).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #358   +/-   ##
=======================================
  Coverage   52.56%   52.56%           
=======================================
  Files         102      102           
  Lines        1716     1716           
  Branches      155      155           
=======================================
  Hits          902      902           
  Misses        795      795           
  Partials       19       19           

Flag	Coverage Δ
unittests	52.56% <ø> (ø)

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