Reference: #8316
Reference: #15737
Previously in AWS GovCloud (US):
```
=== CONT TestAccDataSourceAwsRegion_basic
TestAccDataSourceAwsRegion_basic: provider_test.go:196: [{0 error configuring Terraform AWS Provider: error validating provider credentials: error calling sts:GetCallerIdentity: InvalidClientTokenId: The security token included in the request is invalid.
status code: 403, request id: f02b1c17-7e7d-4e95-ae14-2e02a2f785f4 []}]
--- FAIL: TestAccDataSourceAwsRegion_basic (0.54s)
=== CONT TestAccDataSourceAwsRegion_endpoint
TestAccDataSourceAwsRegion_endpoint: provider_test.go:196: [{0 error configuring Terraform AWS Provider: error validating provider credentials: error calling sts:GetCallerIdentity: InvalidClientTokenId: The security token included in the request is invalid.
status code: 403, request id: 74c054be-32b1-432f-b338-3211315ed76c []}]
--- FAIL: TestAccDataSourceAwsRegion_endpoint (0.50s)
=== CONT TestAccDataSourceAwsRegion_endpointAndName
TestAccDataSourceAwsRegion_endpointAndName: provider_test.go:196: [{0 error configuring Terraform AWS Provider: error validating provider credentials: error calling sts:GetCallerIdentity: InvalidClientTokenId: The security token included in the request is invalid.
status code: 403, request id: 1527b1e9-a329-43f7-b37e-f3a8da479861 []}]
--- FAIL: TestAccDataSourceAwsRegion_endpointAndName (0.51s)
=== CONT TestAccDataSourceAwsRegion_name
TestAccDataSourceAwsRegion_name: provider_test.go:196: [{0 error configuring Terraform AWS Provider: error validating provider credentials: error calling sts:GetCallerIdentity: InvalidClientTokenId: The security token included in the request is invalid.
status code: 403, request id: eef98021-bbe9-46f0-bb2a-4649a0b808dd []}]
--- FAIL: TestAccDataSourceAwsRegion_name (0.43s)
```
Output from acceptance testing in AWS Commercial:
```
--- PASS: TestAccDataSourceAwsRegion_basic (13.01s)
--- PASS: TestAccDataSourceAwsRegion_name (14.91s)
--- PASS: TestAccDataSourceAwsRegion_endpoint (14.92s)
--- PASS: TestAccDataSourceAwsRegion_endpointAndName (14.94s)
```
Output from acceptance testing in AWS GovCloud (US):
```
--- PASS: TestAccDataSourceAwsRegion_basic (17.09s)
--- PASS: TestAccDataSourceAwsRegion_name (19.02s)
--- PASS: TestAccDataSourceAwsRegion_endpoint (19.04s)
--- PASS: TestAccDataSourceAwsRegion_endpointAndName (19.05s)
```