OIDC support for graphql

[elorzafe]

Issue #, if available:

Description of changes:
OPENID Connect support for graphql

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@54f7060). Click here to learn what that means.
The diff coverage is 85.71%.

@@            Coverage Diff            @@
##             master     #861   +/-   ##
=========================================
  Coverage          ?   87.46%           
=========================================
  Files             ?       77           
  Lines             ?     3677           
  Branches          ?      698           
=========================================
  Hits              ?     3216           
  Misses            ?      439           
  Partials          ?       22

Impacted Files	Coverage Δ
packages/aws-amplify/src/API/API.ts	74.03% <85.71%> (ø)

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[manueliglesias]

LGTM 🎉 😃

[elorzafe]

OIDC support for Amplify

[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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