@Entity
@Table(name = "users")
data class User(
        @Id @GeneratedValue val id: Long? = null,
        var name: String = "",
        @OneToOne var profile: Profile? = null
)

@Entity
@Table(name = "profile")
data class Profile (
        @Id @GeneratedValue val id: Long? = null,
        @OneToOne var user: User? = null,
        @OneToMany var subscribers: Set<User>? = null,
        @OneToMany var subscriptions: Set<User>? = null,
)