Fix google auth library imports and grpcio version

[cortadocodes]

Contents (#729)

Fixes

• Fix google auth library imports

Dependencies

• Use new version of grpcio to avoid spurious warning

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.05%. Comparing base (9092646) to head (cd8a6ca).
Report is 347 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #729      +/-   ##
==========================================
- Coverage   94.50%   94.05%   -0.45%     
==========================================
  Files          83       85       +2     
  Lines        3547     3685     +138     
==========================================
+ Hits         3352     3466     +114     
- Misses        195      219      +24     

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