chore: Update CODEOWNERS file to enforce AION SDK team reviews on sha…

…red files. (#1206)

.github/CODEOWNERS

@@ -4,10 +4,27 @@
 # For syntax help see:
 # https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners#codeowners-syntax
 
-# The @googleapis/yoshi-python is the default owner for changes in this repo
-*               @arithmetic1728 @sai-sunder-s @googleapis/googleapis-auth @googleapis/yoshi-python
+# The @googleapis/googleapis-auth and @googleapis/yoshi-python is the default owner for changes in this repo
+*                                                           @googleapis/googleapis-auth @googleapis/yoshi-python
+google/auth/_default.py                                     @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/aws.py                                          @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/credentials.py                                  @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/downscoped.py                                   @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/external_account.py                             @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/external_account_authorized_user.py             @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/identity_pool.py                                @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/pluggable.py                                    @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/sts.py                                          @googleapis/googleapis-auth @googleapis/aion-sdk
+google/auth/impersonated_credentials.py                     @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test__default.py                                      @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_aws.py                                           @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_credentials.py                                   @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_downscoped.py                                    @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_external_account.py                              @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_external_account_authorized_user.py              @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_identity_pool.py                                 @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_pluggable.py                                     @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_sts.py                                           @googleapis/googleapis-auth @googleapis/aion-sdk
+tests/test_impersonated_credentials.py                      @googleapis/googleapis-auth @googleapis/aion-sdk
+/samples/                                                   @googleapis/python-samples-owners
 system_tests/secrets.tar.enc # Remove noise from test creds.
-
-
-# The python-samples-reviewers team is the default owner for samples changes
-/samples/  @googleapis/python-samples-owners