Google Natural Language API - 凭据

Question

对于Cloud Natural Language API的身份验证，我设置了一个指向JSON文件的环境变量。还有其他方法可以执行此操作或对API进行身份验证吗？

到目前为止，我这样称呼API：

public boolean calculateTopics(UpdateWorker updateWorker, String language, List<String> api, List<String> corr, String savePath, boolean feedback) throws InvocationTargetException, IOException, InterruptedException, URISyntaxException, GateException {

        Map<String, Object> apis = startAPI(api, textList, language);

}

public Map<String, Object> startAPI(List<String> selectedAPI, List<String> text, String language) throws InvocationTargetException, IOException, InterruptedException, URISyntaxException, GateException {

    API apiExtract;

    apiExtract = new GoogleAPI(LanguageServiceClient.create());
    googleValues = apiExtract.getEntities(text, language);

}

    public Map<String, Object> getEntities(List<String> textArray, String language) {

            for(String textString : textArray) {
                analyze(textString, language);
                ent.addAll(entities);   
            }



      public List<Entity> analyze(String text, String textL) throws IOException {


              if (textL.equals("english")) {
                        textLanguage = "en";

                    } else {
                        textLanguage = "de";
                    }

              Document doc = Document.newBuilder()
                      .setLanguage(textLanguage).setContent(text).setType(Type.PLAIN_TEXT).build();
                AnalyzeEntitiesRequest request = AnalyzeEntitiesRequest.newBuilder()
                        .setDocument(doc)
                        .setEncodingType(EncodingType.UTF16).build();
                    AnalyzeEntitiesResponse response = entityAPI.analyzeEntities(request);

                    entities = response.getEntitiesList();
                    return entities;
          }