有人可以帮我从这个网站做样子应用程序吗：https://cloud.google.com/natural-language/docs/quickstart-client-libraries#client-libraries-install-php。我做到了，至少我认为我做到了，所需要的一切。而且我经常收到错误 403：
Fatal error: Uncaught exception 'GoogleCloudCoreExceptionServiceException' with message '{ "error": { "code": 403, "message": "The request is missing a valid API key.", "status": "PERMISSION_DENIED" } } ' in C:UsersAdminDropboxHTDOCSnlpvendorgooglecloudCoresrcRequestWrapper.php:263 Stack trace: #0
C:UsersAdminDropboxHTDOCSnlpvendorgooglecloudCoresrcRequestWrapper.php(168): GoogleCloudCoreRequestWrapper->convertToGoogleException(Object(GuzzleHttpExceptionClientException)) #1
C:UsersAdminDropboxHTDOCSnlpvendorgooglecloudCoresrcRestTrait.php(96): GoogleCloudCoreRequestWrapper->send(Object(GuzzleHttpPsr7Request), Array) #2
C:UsersAdminDropboxHTDOCSnlpvendorgooglecloudLanguagesrcConnectionRest.php(69): GoogleCloudLanguageConnectionRest->send('documents', 'analyzeSentimen...', Array) #3
C:UsersAdminDropboxHTDOCSnlpvendorgooglecloudLanguagesrcLanguageClient.php(221): GoogleCloudLanguageConnectionRest->analyzeSentiment(Array) #4
C:Users in C:UsersAdminDropboxHTDOCSnlpvendorgooglecloudCoresrcRequestWrapper.php on line 263
您必须创建一个具有此 API 权限的服务帐户，然后将私钥下载为 JSON 文件。您遵循的教程中提到了它，但您也可以通过命令行执行此操作，如下所示。
$ gcloud iam service-accounts create my-account
$ gcloud iam service-accounts keys create key.json
--iam-account=my-account@my-project.iam.gserviceaccount.com
$ export GOOGLE_APPLICATION_CREDENTIALS=key.json