Student.java

import javax.persistence.*;
import java.io.Serializable;
import java.util.List;

@Entity
@Table(name = "students")
public class Student implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String name;

    private String country;

    private String email;

    @Column(name = "created_at")
    private String createdAt;

    @ManyToMany
    @JoinTable(
            name = "student_courses",
            joinColumns = {@JoinColumn(name = "student_id", referencedColumnName = "id")},
            inverseJoinColumns = {@JoinColumn(name = "course_id", referencedColumnName = "id")}
    )
    private List<Course> courses;

    //TODO add getters and setters for all properties
}