我得到这个错误，当我尝试添加数据到一个数据库与改造，我不知道为什么。
错误：

Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $

售后服务：

Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("https://invazoras-g5-back-desa.herokuapp.com/")
            .addConverterFactory(GsonConverterFactory.create())
            .addConverterFactory(ScalarsConverterFactory.create())
            .build();

final HerokuService service = retrofit.create(HerokuService.class);

电话：

User user = new User (name, email, password, habilitated, moderator);
Call<User > call = service.create(user);
call.enqueue(new Callback<User >() {
   @Override
   public void onResponse(Call<User > call, Response<User > response) {
          User newUser= response.body();
           Toast.makeText(getApplicationContext(), "User"+newUser +"created", Toast.LENGTH_SHORT).show();
   }
   @Override
   public void onFailure(Call<User > call, Throwable t) {
           t.printStackTrace();
           Toast.makeText(getApplicationContext(), t.getMessage(), Toast.LENGTH_SHORT).show();
    }
   });

任何帮助将不胜感激。