(Java) right location of google credential.json as the Secret Files

[CodeBau]

In the topic Using google application credentials JSON? are the information about credential.json as the Secret File.
But it does’t work with standard localization of credential.json (/src/main/resources ) with invoke this method:
GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(jsonFactory, new InputStreamReader(MailboxService.class.getResourceAsStream(“/credential.json”)));
I get error:
java.lang.NullPointerException: null
at java.base/java.io.Reader.(Reader.java:168) ~[na:na]
at java.base/java.io.InputStreamReader.(InputStreamReader.java:76) ~[na:na]

Should i use the sugested /etc/secrets/<YOUR_FILE> directory or the problem is somewhere else ?

[CodeBau]

I was able to solve the issue as soon as I wrote the query. I think this thread will be helpful for other developers.

You should place credential.json in the folder:

my-spring-boot-project
|-- src
|   |-- main
|       |-- java
|           |-- com
|               |-- example
|                   |-- myapplication
|                       |-- controller
|                       |-- service
|                       |-- MyApplication.java
|-- resources
|   |-- application.properties
|-- target
|-- etc
|   |-- secrets
|       |-- credential.json
|-- ...

Then use a function similar to:

public GoogleClientSecrets loadClientSecrets(GsonFactory jsonFactory) throws IOException, GeneralSecurityException 
    {
        String fileName = "credential.json";
        String dirName = "/etc/secrets/";

        Path secretsPath = Paths.get(dirName, fileName);
        File secretFile = secretsPath.toFile();

        try (InputStream in = Files.newInputStream(secretFile.toPath())) {
            return GoogleClientSecrets.load(jsonFactory, new InputStreamReader(in));
        }
    }