presto-google-sheets/src/main/java/io/prestosql/plugin/google/sheets/SheetsClient.java/SheetsClient/getCredentials
class SheetsClient:    private Credential getCredentials()
    {
        try (InputStream in = new FileInputStream(credentialsFilePath)) {
            return GoogleCredential.fromStream(in).createScoped(SCOPES);
        }
        catch (IOException e) {
            throw new PrestoException(SHEETS_BAD_CREDENTIALS_ERROR, e);
        }
    }