Employee.kt

@Entity
@Table(name = "employee")
data class Employee (
        @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
        val id: Long?,
        @Column(name = "user_name", unique = true, nullable = false)
        val userName: String,
        @Column(name = "first_name", nullable = false)
        val firstName: String,
        @Column(name = "middle_name", nullable = true)
        val middleName: String?,
        @Column(name = "last_name", nullable = false)
        val lastName: String,
        @Column(name = "email_address", nullable = false)
        val emailId: String,
        @Column(name = "day_of_birth", nullable = false)
        val dayOfBirth: LocalDate
)