400状态，带“；无效授权”；使用Google API时出错'；Java上的s

我有一个后端进程，它试图自动创建谷歌应用程序用户，直到上周为止，他们一直在工作（据我所知，没有任何变化）。类似于这个问题的其他问题的代码似乎与我的代码无关，或者与我的代码有太大的不同，因为代码被用来提供帮助

以下代码是生成帐户的代码：

            private static String GMAIL_DOMAIN = "obfuscated.com";
            private static String GAPPS_EMAIL = "1234567890-a978g6e789gage96gaf6ag997gawg@developer.gserviceaccount.com";
            private static JsonFactory JSON_FACTORY = JacksonFactory
                .getDefaultInstance();

            HttpTransport httpTransport = GoogleNetHttpTransport
                    .newTrustedTransport();
            List<String> scopes = new ArrayList<String>();
            scopes.add(DirectoryScopes.ADMIN_DIRECTORY_USER);
            scopes.add(DirectoryScopes.ADMIN_DIRECTORY_GROUP_MEMBER);
            File p12 = new File("/opt/gapps.p12");
            GoogleCredential credential = new GoogleCredential.Builder()
                    .setTransport(httpTransport).setJsonFactory(JSON_FACTORY)
                    .setServiceAccountId(GAPPS_EMAIL)
                    .setServiceAccountPrivateKeyFromP12File(p12)
                    .setServiceAccountScopes(scopes)
                    .setServiceAccountUser("obfus@cated.com")
                    .build();
            Directory service = new Directory.Builder(httpTransport,
                    JSON_FACTORY, credential).setApplicationName("Obfuscated")
                    .build();

            // All of these local variables are set further up in the code.
            com.google.api.services.admin.directory.model.User gappsUser = new com.google.api.services.admin.directory.model.User();
            UserName gappsUsername = new UserName();
            gappsUsername.setGivenName(fname);
            gappsUsername.setFamilyName(lname);
            gappsUsername.setFullName(fname + " " + lname);
            gappsUser.setName(gappsUsername);
            gappsUser.setPrimaryEmail(username);
            gappsUser.setPassword(password);

            Directory.Users.Insert gappsRequest = service.users().insert(
                    gappsUser);
            gappsRequest.execute();

我已经验证了p12文件仍然存在，并且就服务帐户凭据而言，所有内容都匹配。我不确定过去一周左右会发生什么变化，但由于缺乏研究成果，我不知道该去哪里寻找，也不知道该做些什么来补救这种情况。如果其他人也经历过类似的事情，我一定会感谢你的帮助

com.google.api.client.auth.oauth2.TokenResponseException: 400 Bad Request
{ "error" : "invalid_grant" } at
com.google.api.client.auth.oauth2.TokenResponseException.from(TokenResponseException.java:105)
at
com.google.api.client.auth.oauth2.TokenRequest.executeUnparsed(TokenRequest.java:287)
at
com.google.api.client.auth.oauth2.TokenRequest.execute(TokenRequest.java:307)
at
com.google.api.client.googleapis.auth.oauth2.GoogleCredential.executeRefreshToken(GoogleCredential.java:384)
at
com.google.api.client.auth.oauth2.Credential.refreshToken(Credential.java:489)
at
com.google.api.client.auth.oauth2.Credential.intercept(Credential.java:217)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:859) at
com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:419)
at
com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)
at
com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)