Player.java

@Entity
public class Player implements Serializable {

    private static final long serialVersionUID = 1L;
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    
    private String name;
    
    private Long rank;
    
    public Player(){
        
    }
    
    public Player(Long id, String name, Long rank) {
        this.id = id;
        this.name = name;
        this.rank = rank;
    }
  
    #Getters, Setters, equals, toString... 
}