### 実装したい機能

GoogleKeepで作成したメモの一覧と、その内容を取得する機能を実装したいと考えています。

### 現状

GoogleKeepApiを使用しメモの一覧を取得しようとしていますが、空のリストが帰ってくる状態です。

### 開発環境等

  * IDE:Eclipse Neon.3 Release (4.6.3)
  * 言語:Java
  * jdk:jdk1.8.0_191

### GoogleCloud側の設定

  * GoogleKeepApi：有効化済み
  * OAuth同意画面：作成済み
  * サービスアカウント：作成済み

### 現状の実装

```

    private static final String APPLICATION_NAME = "**********";
    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
    private static final List<String> SCOPES = Collections.singletonList(KeepScopes.KEEP);
    
    private GoogleCredentials getCredentials(final NetHttpTransport HTTP_TRANSPORT, String temple_code) throws IOException {
    
        String gredentials_file_path = "********************" + "/credentials.json";
    
        // Load client secrets.
        AmazonUtil amazon = new AmazonUtil(configuration);
        AmazonS3 amazonS3Client = amazon.createAmazonS3();
        S3Object s3Obj = amazon.downLoadS3Object(amazonS3Client, gredentials_file_path);
    
        InputStream in = s3Obj.getObjectContent();
        GoogleCredentials googleCredentials = GoogleCredentials.fromStream(in).createScoped(SCOPES);
    
        return googleCredentials;
    }
    
    public void loadDocuments(String temple_code) throws GeneralSecurityException, IOException, ErrorCheckException {
    
        final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
    
        GoogleCredentials credential = getCredentials(HTTP_TRANSPORT, temple_code);
        Keep service = new Keep.Builder(HTTP_TRANSPORT, JSON_FACTORY, new HttpCredentialsAdapter(credential))
                .setApplicationName(APPLICATION_NAME)
                .build();
    
        Notes notes = service.notes();
        System.out.println(notes);
    
        Keep.Notes.List  notes_list = notes.list();
        System.out.println(notes_list);
    
        ListNotesResponse response = notes_list.execute();
        System.out.println(response);
    }
    
```

### 出力

> com.google.api.services.keep.v1.Keep$Notes@6384c9de  
>  GenericData{classInfo=[$.xgafv, access_token, alt, callback, fields,  
>  filter, key, oauth_token, pageSize, pageToken, prettyPrint, quotaUser,  
>  uploadType, upload_protocol], {}}  
>  {}
CC BY-SA 4.0
2022-12-05T23:29:38.837
92596
2022-12-05T23:29:38.837
7384
question
java google-api
GoogleKeepApiを使用し、Keepで作成したメモの一覧が取得できない