docs: public ApiResponse createUser(String username, String name, String email,
              String password) {
          Map<String, Object> properties = new HashMap<String, Object>();
          properties.put("type", "user");
          if (username != null) {
              properties.put("username", username);
          }
          if (name != null) {
              properties.put("name", name);
          }
          if (email != null) {
              properties.put("email", email);
          }
          if (password != null) {
              properties.put("password", password);
          }
          return createEntity(properties);
      }