Android : fetching data from kinvey causing app crash

I am making an android app and fetching data from kinvey. It is creating users and logging them in but when i try to fetch data from kinvey then app got crashed. here ismy entity class:

Here is the kinvey Collection for my app:

and finally here is my code in main class from where i am try to fetch data:

and here is the catlog in order you want to see error