chore(main): release auth 0.2.0 (#9559)

🤖 I have created a release *beep* *boop*
---


## [0.2.0](https://togithub.com/googleapis/google-cloud-go/compare/auth/v0.1.1...auth/v0.2.0) (2024-04-15)


### Features

* **auth/credentials/externalaccount:** Add default TokenURL ([#9700](https://togithub.com/googleapis/google-cloud-go/issues/9700)) ([81830e6](https://togithub.com/googleapis/google-cloud-go/commit/81830e6848ceefd055aa4d08f933d1154455a0f6))
* **auth:** Add downscope.Options.UniverseDomain ([#9634](https://togithub.com/googleapis/google-cloud-go/issues/9634)) ([52cf7d7](https://togithub.com/googleapis/google-cloud-go/commit/52cf7d780853594291c4e34302d618299d1f5a1d))
* **auth:** Add universe domain to grpctransport and httptransport ([#9663](https://togithub.com/googleapis/google-cloud-go/issues/9663)) ([67d353b](https://togithub.com/googleapis/google-cloud-go/commit/67d353beefe3b607c08c891876fbd95ab89e5fe3)), refs [#9670](https://togithub.com/googleapis/google-cloud-go/issues/9670)
* **auth:** Add UniverseDomain to DetectOptions ([#9536](https://togithub.com/googleapis/google-cloud-go/issues/9536)) ([3618d3f](https://togithub.com/googleapis/google-cloud-go/commit/3618d3f7061615c0e189f376c75abc201203b501))
* **auth:** Make package externalaccount public ([#9633](https://togithub.com/googleapis/google-cloud-go/issues/9633)) ([a0978d8](https://togithub.com/googleapis/google-cloud-go/commit/a0978d8e96968399940ebd7d092539772bf9caac))
* **auth:** Move credentials to base auth package ([#9590](https://togithub.com/googleapis/google-cloud-go/issues/9590)) ([1a04baf](https://togithub.com/googleapis/google-cloud-go/commit/1a04bafa83c27342b9308d785645e1e5423ea10d))
* **auth:** Refactor public sigs to use Credentials ([#9603](https://togithub.com/googleapis/google-cloud-go/issues/9603)) ([69cb240](https://togithub.com/googleapis/google-cloud-go/commit/69cb240c530b1f7173a9af2555c19e9a1beb56c5))


### Bug Fixes

* **auth/oauth2adapt:** Update protobuf dep to v1.33.0 ([30b038d](https://togithub.com/googleapis/google-cloud-go/commit/30b038d8cac0b8cd5dd4761c87f3f298760dd33a))
* **auth:** Fix uint32 conversion ([9221c7f](https://togithub.com/googleapis/google-cloud-go/commit/9221c7fa12cef9d5fb7ddc92f41f1d6204971c7b))
* **auth:** Port sts expires fix ([#9618](https://togithub.com/googleapis/google-cloud-go/issues/9618)) ([7bec97b](https://togithub.com/googleapis/google-cloud-go/commit/7bec97b2f51ed3ac4f9b88bf100d301da3f5d1bd))
* **auth:** Read universe_domain from all credentials files ([#9632](https://togithub.com/googleapis/google-cloud-go/issues/9632)) ([16efbb5](https://togithub.com/googleapis/google-cloud-go/commit/16efbb52e39ea4a319e5ee1e95c0e0305b6d9824))
* **auth:** Remove content-type header from idms get requests ([#9508](https://togithub.com/googleapis/google-cloud-go/issues/9508)) ([8589f41](https://togithub.com/googleapis/google-cloud-go/commit/8589f41599d265d7c3d46a3d86c9fab2329cbdd9))
* **auth:** Update protobuf dep to v1.33.0 ([30b038d](https://togithub.com/googleapis/google-cloud-go/commit/30b038d8cac0b8cd5dd4761c87f3f298760dd33a))

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

Author: release-please[bot]

.release-please-manifest-individual.json

@@ -1,6 +1,6 @@
 {
   "aiplatform": "1.67.0",
-  "auth": "0.1.1",
+  "auth": "0.2.0",
   "auth/oauth2adapt": "0.1.0",
   "bigquery": "1.60.0",
   "bigtable": "1.22.0",

auth/CHANGES.md

@@ -1,5 +1,51 @@
 # Changelog
 
+## [0.2.0](https://github.com/googleapis/google-cloud-go/compare/auth/v0.1.1...auth/v0.2.0) (2024-04-15)
+
+### Breaking Changes
+
+In the below mentioned commits there were a few large breaking changes since the
+last release of the module.
+
+1. The `Credentials` type has been moved to the root of the module as it is
+   becoming the core abstraction for the whole module.
+2. Because of the above mentioned change many functions that previously
+   returned a `TokenProvider` now return `Credentials`. Similarly, these
+   functions have been renamed to be more specific.
+3. Most places that used to take an optional `TokenProvider` now accept
+   `Credentials`. You can make a `Credentials` from a `TokenProvider` using the
+   constructor found in the `auth` package.
+4. The `detect` package has been renamed to `credentials`. With this change some
+   function signatures were also updated for better readability.
+5. Derivative auth flows like `impersonate` and `downscope` have been moved to
+   be under the new `credentials` package.
+
+Although these changes are disruptive we think that they are for the best of the
+long-term health of the module. We do not expect any more large breaking changes
+like these in future revisions, even before 1.0.0. This version will be the
+first version of the auth library that our client libraries start to use and
+depend on.
+
+### Features
+
+* **auth/credentials/externalaccount:** Add default TokenURL ([#9700](https://github.com/googleapis/google-cloud-go/issues/9700)) ([81830e6](https://github.com/googleapis/google-cloud-go/commit/81830e6848ceefd055aa4d08f933d1154455a0f6))
+* **auth:** Add downscope.Options.UniverseDomain ([#9634](https://github.com/googleapis/google-cloud-go/issues/9634)) ([52cf7d7](https://github.com/googleapis/google-cloud-go/commit/52cf7d780853594291c4e34302d618299d1f5a1d))
+* **auth:** Add universe domain to grpctransport and httptransport ([#9663](https://github.com/googleapis/google-cloud-go/issues/9663)) ([67d353b](https://github.com/googleapis/google-cloud-go/commit/67d353beefe3b607c08c891876fbd95ab89e5fe3)), refs [#9670](https://github.com/googleapis/google-cloud-go/issues/9670)
+* **auth:** Add UniverseDomain to DetectOptions ([#9536](https://github.com/googleapis/google-cloud-go/issues/9536)) ([3618d3f](https://github.com/googleapis/google-cloud-go/commit/3618d3f7061615c0e189f376c75abc201203b501))
+* **auth:** Make package externalaccount public ([#9633](https://github.com/googleapis/google-cloud-go/issues/9633)) ([a0978d8](https://github.com/googleapis/google-cloud-go/commit/a0978d8e96968399940ebd7d092539772bf9caac))
+* **auth:** Move credentials to base auth package ([#9590](https://github.com/googleapis/google-cloud-go/issues/9590)) ([1a04baf](https://github.com/googleapis/google-cloud-go/commit/1a04bafa83c27342b9308d785645e1e5423ea10d))
+* **auth:** Refactor public sigs to use Credentials ([#9603](https://github.com/googleapis/google-cloud-go/issues/9603)) ([69cb240](https://github.com/googleapis/google-cloud-go/commit/69cb240c530b1f7173a9af2555c19e9a1beb56c5))
+
+
+### Bug Fixes
+
+* **auth/oauth2adapt:** Update protobuf dep to v1.33.0 ([30b038d](https://github.com/googleapis/google-cloud-go/commit/30b038d8cac0b8cd5dd4761c87f3f298760dd33a))
+* **auth:** Fix uint32 conversion ([9221c7f](https://github.com/googleapis/google-cloud-go/commit/9221c7fa12cef9d5fb7ddc92f41f1d6204971c7b))
+* **auth:** Port sts expires fix ([#9618](https://github.com/googleapis/google-cloud-go/issues/9618)) ([7bec97b](https://github.com/googleapis/google-cloud-go/commit/7bec97b2f51ed3ac4f9b88bf100d301da3f5d1bd))
+* **auth:** Read universe_domain from all credentials files ([#9632](https://github.com/googleapis/google-cloud-go/issues/9632)) ([16efbb5](https://github.com/googleapis/google-cloud-go/commit/16efbb52e39ea4a319e5ee1e95c0e0305b6d9824))
+* **auth:** Remove content-type header from idms get requests ([#9508](https://github.com/googleapis/google-cloud-go/issues/9508)) ([8589f41](https://github.com/googleapis/google-cloud-go/commit/8589f41599d265d7c3d46a3d86c9fab2329cbdd9))
+* **auth:** Update protobuf dep to v1.33.0 ([30b038d](https://github.com/googleapis/google-cloud-go/commit/30b038d8cac0b8cd5dd4761c87f3f298760dd33a))
+
 ## [0.1.1](https://github.com/googleapis/google-cloud-go/compare/auth/v0.1.0...auth/v0.1.1) (2024-03-10)
 
 
@@ -31,4 +77,3 @@
 
 * **auth/oauth2adapt:** Update golang.org/x/net to v0.17.0 ([174da47](https://github.com/googleapis/google-cloud-go/commit/174da47254fefb12921bbfc65b7829a453af6f5d))
 * **auth:** Update golang.org/x/net to v0.17.0 ([174da47](https://github.com/googleapis/google-cloud-go/commit/174da47254fefb12921bbfc65b7829a453af6f5d))
-