WP Rest API in Android studio does not show Images

I am developing WP API. I show you the screen of the problem:
https://ibb.co/7jWJ8cn

I want to get the main image of wordpress’s articles for each article.

MainActivity class:

Model class:

}

RetrofitAPI class:

Recyclerview class:

When I run the App, I get title and part of article but I can’t parse the main image of the articles.

Some suggestion?