Using sharesOf when getting vault shares on steth

[slundqui]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.05%. Comparing base (ae99a41) to head (bf714c5).
Report is 102 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1581      +/-   ##
==========================================
+ Coverage   82.00%   82.05%   +0.04%     
==========================================
  Files          98       98              
  Lines        7236     7239       +3     
==========================================
+ Hits         5934     5940       +6     
+ Misses       1302     1299       -3     

Flag	Coverage Δ
unittests	82.05% <100.00%> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.