Fixing saved credential issue for --credential-process introduced by https://github.com/Versent/saml2aws/pull/896

[timharris777]

PR to address this: #895 (comment)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 40.00000% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 41.89%. Comparing base (16a69e6) to head (1af5aca).
Report is 16 commits behind head on master.

Files	Patch %	Lines
cmd/saml2aws/commands/login.go	40.00%	8 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1274      +/-   ##
==========================================
- Coverage   41.93%   41.89%   -0.04%     
==========================================
  Files          54       54              
  Lines        6386     6425      +39     
==========================================
+ Hits         2678     2692      +14     
- Misses       3271     3291      +20     
- Partials      437      442       +5     

Flag	Coverage Δ
unittests	41.89% <40.00%> (-0.04%)	⬇️

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