Update README.md

[Nicnick-Xia]

update Auth Cloud Config

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Contribution Checklist

• Name the pull request in the form "[Issue XYZ][component] Title of the pull request", where XYZ should be replaced by the actual issue number.
  Skip Issue XYZ if there is no associated github issue for this pull request.
  Skip component if you are unsure about which is the best component. E.g. [docs] Fix typo in produce method.

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(The sections below can be removed for hotfixes of typos)
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(If this PR fixes a github issue, please add Fixes #<xyz>.)

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Motivation

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Modifications

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Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

(or)

This change is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

(example:)

• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Does this pull request potentially affect one of the following parts:

If yes was chosen, please highlight the changes

• Dependencies (does it add or upgrade a dependency): (yes / no)
• The public API: (yes / no)
• The schema: (yes / no / don't know)
• The default values of configurations: (yes / no)
• The wire protocol: (yes / no)

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / GoDocs / not documented)
• If a feature is not applicable for documentation, explain why?
• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation