É possível acessar a API de provisionamento com conta de serviço?

Os escopos da minha conta de serviço são:https://apps-apis.google.com/a/feeds/user/ e DriveScope.DRIVE

Eu autorizei esse mesmo escopo em "Gerenciar o acesso do Cliente OAuth de terceiros" nas configurações de domínio do ID da minha conta de serviço.

Eu uso o cliente java da API de provisionamento.

Eu construo minhas credenciais com o google oauth client com umGoogleCredential.Builder :

credBuilder.setTransport(HTTP_TRANSPORT)
        .setJsonFactory(JSON_FACTORY)
        .setServiceAccountId(config.serviceAccountId)
        .setServiceAccountPrivateKeyFromP12File(new File(config.keyFilePath))
        .setServiceAccountScopes(SCOPES);
        .setServiceAccountUser("[email protected]")

Eu tento autorizar o meu pedido para a API de provisionamento com

userService = new UserService(config.repositoryId);
userService.setOAuth2Credentials(oAuthCredentials);

OndeoAuthCredentials são minhas credenciais de serviço criadas anteriormente.

Com essa configuração, posso acessar arquivos e coleções do Google Drive de qualquer usuário do meu domínio. Mas não consigo acessar a lista de usuários do meu domínio com essas credenciais.

Se eu não especificar o usuário da conta de serviço, ele também não funciona

Aqui está o rastreamento de pilha que eu recebo:

com.google.gdata.util.ServiceForbiddenException: You are not authorized to access this API.
<HTML>
<HEAD>
<TITLE>You are not authorized to access this API.</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>You are not authorized to access this API.</H1>
<H2>Error 403</H2>
</BODY>
</HTML>
at com.google.gdata.client.http.HttpGDataRequest.handleErrorResponse(HttpGDataRequest.java:605)
at com.google.gdata.client.http.GoogleGDataRequest.handleErrorResponse(GoogleGDataRequest.java:564)
at com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:560)
at com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:538)
at com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:536)
at com.google.gdata.client.Service.getFeed(Service.java:1135)
at com.google.gdata.client.Service.getFeed(Service.java:998)
at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:645)
at com.google.gdata.client.Service.getFeed(Service.java:1017)
at com.google.gdata.client.appsforyourdomain.AppsForYourDomainService.getFeed(AppsForYourDomainService.java:137)
at foo.bar.baz.eci.gdrive.service.BaseService$1.doTry(BaseService.java:125)
at foo.bar.baz.eci.gdrive.service.BaseService$1.doTry(BaseService.java:1)
at foo.bar.baz.eci.gdrive.service.backoff.BackoffRequest.execute(BackoffRequest.java:50)
at foo.bar.baz.eci.gdrive.service.BaseService.getFeedWithBackoff(BaseService.java:129)
at foo.bar.baz.eci.gdrive.service.BaseService.retrieveAllEntries(BaseService.java:90)
at foo.bar.baz.eci.gdrive.service.GappsUserService.getAllUserFeed(GappsUserService.java:57)
at foo.bar.baz.eci.gdrive.GdriveContentProviderFactory.doDiscover(GdriveContentProviderFactory.java:67)
... 19 more

E o log do cliente lib:

21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setPrivateHeader
PLUS FIN: Authorization: <Not Logged>
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setPrivateHeader
PLUS FIN: Authorization: <Not Logged>
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setPrivateHeader
PLUS FIN: Authorization: <Not Logged>
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: User-Agent: gdocsRepo GData-Java/1.47.1(gzip)
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: User-Agent: gdocsRepo GData-Java/1.47.1(gzip)
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: User-Agent: gdocsRepo GData-Java/1.47.1(gzip)
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: Accept-Encoding: gzip
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: Accept-Encoding: gzip
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: Accept-Encoding: gzip
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: GData-Version: 1.0
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: GData-Version: 1.0
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest setHeader
PLUS FIN: GData-Version: 1.0
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
FIN: 403 You are not authorized to access this API.
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
FIN: 403 You are not authorized to access this API.
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
FIN: 403 You are not authorized to access this API.
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Encoding: gzip
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Encoding: gzip
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Encoding: gzip
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Length: 151
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Length: 151
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Length: 151
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: null: HTTP/1.1 403 You are not authorized to access this API.
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: null: HTTP/1.1 403 You are not authorized to access this API.
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: null: HTTP/1.1 403 You are not authorized to access this API.
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Expires: Wed, 21 Nov 2012 14:17:37 GMT
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Expires: Wed, 21 Nov 2012 14:17:37 GMT
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Expires: Wed, 21 Nov 2012 14:17:37 GMT
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-XSS-Protection: 1; mode=block
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-XSS-Protection: 1; mode=block
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-XSS-Protection: 1; mode=block
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-Frame-Options: SAMEORIGIN
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-Frame-Options: SAMEORIGIN
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-Frame-Options: SAMEORIGIN
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Date: Wed, 21 Nov 2012 14:17:37 GMT
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Date: Wed, 21 Nov 2012 14:17:37 GMT
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Date: Wed, 21 Nov 2012 14:17:37 GMT
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Type: text/html; charset=UTF-8
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Type: text/html; charset=UTF-8
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Content-Type: text/html; charset=UTF-8
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Server: GSE
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Server: GSE
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Server: GSE
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-Content-Type-Options: nosniff
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-Content-Type-Options: nosniff
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: X-Content-Type-Options: nosniff
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Cache-Control: private, max-age=0
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Cache-Control: private, max-age=0
21 nov. 2012 15:17:37 com.google.gdata.client.http.HttpGDataRequest execute
PLUS FIN: Cache-Control: private, max-age=0

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