docs: public static Map<String, Object> initUser() {
  
      Map<String, Object> user = new HashMap<String, Object>();
      Map<String, Object> tone = new HashMap<String, Object>();
  
      Map<String, Object> emotionTone = new HashMap<String, Object>();
      emotionTone.put("current", null);
  
      Map<String, Object> socialTone = new HashMap<String, Object>();
      socialTone.put("current", null);
  
      Map<String, Object> languageTone = new HashMap<String, Object>();
      languageTone.put("current", null);
  
      tone.put("emotion", emotionTone);
      tone.put("social", socialTone);
      tone.put("language", languageTone);
  
      user.put("tone", tone);
  
      return user;
    }