@POST("/Auth/authenticate")
Call<ApiResponse> createAccount(@Body Request user);

request = new Request("01532383497", "123");

    retrofit = RetrofitInstance.getInstance();

    client = retrofit.create(APIClient.class);

    client.createAccount(request).enqueue(new Callback<ApiResponse>() {
        @Override
        public void onResponse(Call<ApiResponse> call, Response<ApiResponse> response) {
            String a=response.body().getType();
            Log.d("d","d");
        }

        @Override
        public void onFailure(Call<ApiResponse> call, Throwable t) {
            Log.d("d","d");
        }
    });

String Username;
String Password;

public Request(String Username, String Password) {
    Username = Username;
    Password = Password;
}

public String getUsername() {
    return Username;
}

public void setUsername(String username) {
    Username = username;
}

public String getPassword() {
    return Password;
}

public void setPassword(String password) {
    Password = password;
}

public class RetrofitInstance {

public static Retrofit retrofit = null;
public static final String END_POINT = "http://192.168.0.104:50111/api/";

public static Retrofit getInstance(){
    if (retrofit == null){

        retrofit = new Retrofit.Builder().baseUrl(END_POINT)
                .addConverterFactory(GsonConverterFactory.create())
                .build();

    }
    return retrofit;
}