wait for current credentials before signOut

[richardzcode]

Fixes #245

[codecov-io]

Codecov Report

Merging #247 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #247      +/-   ##
==========================================
+ Coverage   90.77%   90.77%   +<.01%     
==========================================
  Files          53       53              
  Lines        2515     2516       +1     
  Branches      510      510              
==========================================
+ Hits         2283     2284       +1     
  Misses        221      221              
  Partials       11       11

Impacted Files	Coverage Δ
packages/aws-amplify/src/Auth/Auth.ts	89.47% <100%> (+0.02%)	⬆️

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[elorzafe]

👍

[github-actions]

This pull request has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

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