ADD database integration & ADD simple dummy user entity

src/main/java/com/ddf/vodsystem/entities/User.java

@@ -0,0 +1,32 @@
+package com.ddf.vodsystem.entities;
+
+import jakarta.persistence.*;
+import lombok.Data;
+
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "users")
+@Data
+public class User {
+    @Column(name = "id", nullable = false, unique = true)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Id
+    private Long id;
+
+    @Column(name = "google_id", nullable = false, unique = true)
+    private String googleId;
+
+    @Column(name = "username", nullable = false, unique = true)
+    private String username;
+
+    @Column(name = "email", nullable = false, unique = true)
+    private String email;
+
+    @Column(name = "name", nullable = false)
+    private String name;
+
+    @Column(name = "created_at", nullable = false)
+    private LocalDateTime createdAt;
+}
+