How to make Primary key Auto increment while using Composite Primary keys in Room persistent library?

I found another way around for this problem because as per my knowledge after some R&D, we can not have auto increment property in Composite Primary keys. So I used indices and unique constraint here because Room does not have direct UNIQUE constraint till now. So below is my working code:

@Entity(tableName = "newsPapers", indices = {@Index(value = 
       {"news_paper_name"}, unique = true)})
public class SelectNewsModel {

    @PrimaryKey(autoGenerate = true)
    private int news_paper_id;

    @ColumnInfo(name = "image_url")
    private String imageUrl;

    @ColumnInfo(name = "news_paper_name")
    private String newsPaperName;
}

Priyanka Alachiya's answer is right, but I needed sample in Kotlin...

For Kotlin:

@Entity(tableName = "newsPapers", indices = arrayOf(Index(value = ["news_paper_name"], unique = true)))

Here Kotlin solution