E/fail: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path

Question

I started learn retrofit library and I have one problem

My API is https://alien-backend.herokuapp.com/api/tutorials

public interface UserService {

    @GET("api/tutorials?type=json")
    Call<List<UserResponse>> getAllUsers();
}


    public class UserResponse {
    private String id;
    private String title;
    private String description;
    private String image;
    private String createdAt;
    private String updatedAt;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }

    public String getCreatedAt() {
        return createdAt;
    }

    public void setCreatedAt(String createdAt) {
        this.createdAt = createdAt;
    }

    public String getUpdatedAt() {
        return updatedAt;
    }

    public void setUpdatedAt(String updatedAt) {
        this.updatedAt = updatedAt;
    }

    @Override
    public String toString() {
        return "UserResponse{" +
                "id='" + id + '\'' +
                ", title='" + title + '\'' +
                ", description='" + description + '\'' +
                ", image='" + image + '\'' +
                ", createdAt='" + createdAt + '\'' +
                ", updatedAt='" + updatedAt + '\'' +
                '}';
    }
}
    

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Call<List<UserResponse>> userlist = ApiClient.getUserService().getAllUsers();

    userlist.enqueue(new Callback<List<UserResponse>>() {
        @Override
        public void onResponse(Call<List<UserResponse>> call, Response<List<UserResponse>> response) {
            if (response.isSuccessful()){
                
                Log.e("success", response.body().toString());
            }
        }

        @Override
        public void onFailure(Call<List<UserResponse>> call, Throwable t) {
            Log.e("fail", t.getLocalizedMessage());
        }
    });
}

}

public class ApiClient { private static Retrofit getRetrofit(){

    HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();
    httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
    OkHttpClient okHttpClient = new OkHttpClient.Builder().addInterceptor(httpLoggingInterceptor).build();

    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("https://alien-backend.herokuapp.com/")
            .addConverterFactory(GsonConverterFactory.create())
            .client(okHttpClient)
            .build();

    return retrofit;
}


public static UserService getUserService(){
    UserService userService = getRetrofit().create(UserService.class);
    return userService;
}

}

When I try to run app I get a problem

D/OkHttp: {"totalItems":3,"tutorials":[{"title":"Dog 4","description":"This is my dog , maybe","image":"https://faunistics.com/wp-content/uploads/2019/06/3-9.jpg","createdAt":"2022-03-09T16:32:35.318Z","updatedAt":"2022-03-10T10:43:22.926Z","id":"6228d6a38989627eb8d404d2"},{"title":"Dog 2","description":"Какое-то описанеи для второго поста","image":"https://pbs.twimg.com/media/CyIKGO4WgAA0K5K.jpg:large","createdAt":"2022-03-09T17:55:14.377Z","updatedAt":"2022-03-09T17:55:14.377Z","id":"6228ea02226449d633e51545"},{"title":"Dog 3","description":"А это уже третий пост","image":"https://klkfavorit.ru/wp-content/uploads/2/f/a/2fa86dbececb4b25587ccf2bc4da84cd.jpeg","createdAt":"2022-03-09T17:55:48.463Z","updatedAt":"2022-03-09T17:55:48.463Z","id":"6228ea24226449d633e51547"}],"totalPages":1,"currentPage":0} D/OkHttp: <-- END HTTP (848-byte body) E/fail: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $ D/InputMethodManager: prepareNavigationBarInfo() DecorView@8e0fe86[MainActivity]

Can anybody help me ?