Как распарсить getUpdates на Retrofit2 в API telegram?

Question

[Андрей]

помогите распарсить getUpdates в API telegram....
суть в том что ссылка парсится, а вот данные приходят NULL....

https://api.telegram.org/bot1080783949:AAEvVVE_fmi...

делаю через библиотеку Retrofit 2....

в MainActivity:

NetworkService.getInstance()
                    .getJSONApi()
                    .operation("result")
                    .enqueue(new Callback<Post>() {
                        @Override
                        public void onResponse(@NonNull Call<Post> call, @NonNull Response<Post> response) {
                            Post post = response.body();

                            Log.v("response1", post.getUpdateId() + " " + post.getId() + " " + post.getMessageId()+ " " + 
                            post.getText());
                        }

                        @Override
                        public void onFailure(@NonNull Call<Post> call, @NonNull Throwable t) {
                            Toast.makeText(MainActivity.this, "Error occurred while getting request!", 
                            Toast.LENGTH_SHORT).show();
                            //textView.append("Error occurred while getting request!");
                            t.printStackTrace();
                        }
                    });

код NetworkService:

public class NetworkService {
    private static NetworkService mInstance;
    private static final String BASE_URL = "https://api.telegram.org";
    private Retrofit mRetrofit;
	public static final String LOGIN_OPERATION = "login";

    private NetworkService() {
        mRetrofit = new Retrofit.Builder()
			.baseUrl(BASE_URL)
			.addConverterFactory(GsonConverterFactory.create())
			.build();
		
    }

    public static NetworkService getInstance() {
        if (mInstance == null) {
            mInstance = new NetworkService();

			NetworkService.getInstance()
				.getJSONApi()
				.operation("result")
				.enqueue(new Callback<Post>() {

					private Context context;
					@Override
					public void onResponse(@NonNull Call<Post> call, @NonNull Response<Post> response) {
						Post post = response.body();
}
					@Override
					public void onFailure(@NonNull Call<Post> call, @NonNull Throwable t) {
						Toast.makeText(context, "Error occurred while getting request!", Toast.LENGTH_SHORT).show();						
						
						t.printStackTrace();
					}
				});
        }
        return mInstance;
    }
	public JSONPlaceHolderApi getJSONApi() {
        return mRetrofit.create(JSONPlaceHolderApi.class);
    }

код JSONPlaceHolderApi :

public interface JSONPlaceHolderApi {

    @POST("/bot1080783949:AAEvVVE_fmiHqBU9Oy_rd2RxTmxdbWQOdAc/getUpdates")
    Call<Post> operation(@Body String request);
}

код Post:

public class Post {
    @SerializedName("update_id")
    @Expose
    private double update_id;
	
    @SerializedName("message_id")
    @Expose
    private int message_id;
	
    @SerializedName("id")
    @Expose
    private double id;
	
    @SerializedName("username")
    @Expose
    private String username;
	
	@SerializedName("date")
    @Expose
    private double date;
	
	@SerializedName("text")
    @Expose
    private String text;

    public double getUpdateId() {
        return update_id;
    }
    public void setUpdateId(double update_id) {
        this.update_id = update_id;
    }
    public int getMessageId() {
        return message_id;
    }
    public void setMessageId(int message_id) {
        this.message_id = message_id;
    }
    public double getId() {
        return id;
    }
    public void setId(double id) {
        this.id = id;
    }
    public String getUserName() {
        return username;
    }
    public void setUserName(String username) {
        this.username = username;
    }
	public double getDate() {
        return date;
    }
    public void setDate(double date) {
        this.date = date;
    }
	public String getText() {
        return text;
    }
    public void setText(String text) {
        this.text = text;
    }
}