🤖 I have created a release *beep* *boop*
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### Updating meta-information for bleeding-edge SNAPSHOT release.

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This PR was generated with [Release Please](https://togithub.com/googleapis/release-please). See [documentation](https://togithub.com/googleapis/release-please#release-please).

Date parsing can fail in other locales.

Specifically, in `en-CA` (Canada), the tests's defined date `Mon, 09 Sep 2011 23:36:00 GMT` won't
parse correctly, as the weekday short name for the locale is `Mon.` (extra period).

* feat: Expose scopes granted by user

* Fix Access Token failure

* Update more AT tests

* scopes as list

* fix compilation error

* fix tests

* Add more tests

* update test

…#1125)

* fix: acessToken scopes clean serialization and default as empty list

* cleanup and more tests

* 🦉 Updates from OwlBot post-processor

…g OAuth2CredentialsWithRefresh (#1131)

* fix: Ensure both refreshMargin and expirationMargin are set when using OAuth2CredentialsWithRefresh

* fix: review

* feat: adds external account authorized user credentials

* fix: positioning

* fix: serialVersionUID

* fix: toString() test

* fix: tests

#1109)

Listeners for Futures should generally use Futures.addCallback() or
Futures.getDone() when called. This makes it clear they won't block and
allows tooling to know it will never block.

cl/492555987

Co-authored-by: Timur Sadykov <[email protected]>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>