Check cli credential file existes when get cli credential

[Flanker32]

Check cli credential file existes when get cli credential

[codecov-io]

Codecov Report

Merging #1016 into develop will decrease coverage by <.01%.
The diff coverage is 44.44%.

@@              Coverage Diff              @@
##             develop    #1016      +/-   ##
=============================================
- Coverage      38.62%   38.61%   -0.01%     
  Complexity       626      626              
=============================================
  Files            112      112              
  Lines           4694     4695       +1     
  Branches         727      728       +1     
=============================================
  Hits            1813     1813              
  Misses          2735     2735              
- Partials         146      147       +1

Impacted Files	Coverage Δ	Complexity Δ
...java/com/microsoft/azure/auth/AzureAuthHelper.java	62.16% <44.44%> (-0.57%)	36 <0> (ø)

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 44.44444% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.61%. Comparing base (a8d1f44) to head (b7b5db5).
⚠️ Report is 4035 commits behind head on develop.

Files with missing lines	Patch %	Lines
...java/com/microsoft/azure/auth/AzureAuthHelper.java	44.44%	2 Missing and 3 partials ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #1016      +/-   ##
=============================================
- Coverage      38.62%   38.61%   -0.01%     
  Complexity       626      626              
=============================================
  Files            112      112              
  Lines           4694     4695       +1     
  Branches         727      728       +1     
=============================================
  Hits            1813     1813              
  Misses          2735     2735              
- Partials         146      147       +1     

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