code: private String executeCommand() throws IOException, InterruptedException {
          ProcessBuilder processBuilder = new ProcessBuilder(command);
  
          ByteArrayOutputStream commandOutput = new ByteArrayOutputStream();
  
          Process process = processBuilder.start();
          try {
              IOUtils.copy(process.getInputStream(), commandOutput, processOutputLimit);
  
              process.waitFor();
  
              if (process.exitValue() != 0) {
                  throw new IllegalStateException("Command returned non-zero exit value: " + process.exitValue());
              }
  
              return new String(commandOutput.toByteArray(), StringUtils.UTF8);
          } finally {
              process.destroy();
          }
      }
docs: Execute the external process to retrieve credentials.