import javax.persistence.Table;
import javax.validation.constraints.Digits;
import javax.validation.constraints.NotNull;
-import javax.validation.constraints.PastOrPresent;
import javax.validation.constraints.Size;
import lombok.AllArgsConstructor;
import lombok.EqualsAndHashCode;
@Table(name = "ep_ml_user")
@NoArgsConstructor
@AllArgsConstructor
-@EqualsAndHashCode
@Getter
@Setter
@Entity
@IdClass(EpMlUserId.class)
-public class EpMlUser {
+public class EpMlUser implements Serializable{
@Id
@Column(name = "time_stamp", nullable = false, columnDefinition = "datetime DEFAULT current_timestamp()")
private LocalDateTime timeStamp;