✨ feat: 유저의 인증 정보만을 저장하는 Auth Credential Domain 정의 (#42)

src/main/java/slvtwn/khu/toyouserver/domain/User.java

@@ -17,22 +17,26 @@
 @Getter
 public class User extends BaseTimeEntity {
 
-    @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private Long id;
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	private Long id;
 
-    private String name;
+	private String name;
 
-    private LocalDate birthday;
+	private LocalDate birthday;
 
-    private String introduction;
+	private String introduction;
 
-    private String profilePicture;
+	private String profilePicture;
 
-    public User(String name, LocalDate birthday, String introduction, String profilePicture) {
-        this.name = name;
-        this.birthday = birthday;
-        this.introduction = introduction;
-        this.profilePicture = profilePicture;
-    }
+	public User(String name, LocalDate birthday, String introduction, String profilePicture) {
+		this.name = name;
+		this.birthday = birthday;
+		this.introduction = introduction;
+		this.profilePicture = profilePicture;
+	}
+
+	public static User create(String name, String profilePicture) {
+		return new User(name, null, null, profilePicture);
+	}
 }

src/main/java/slvtwn/khu/toyouserver/domain/UserOAuthCredential.java

@@ -0,0 +1,39 @@
+package slvtwn.khu.toyouserver.domain;
+
+import static slvtwn.khu.toyouserver.domain.SocialAuthProvider.KAKAO;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public class UserOAuthCredential {
+
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	private Long id;
+
+	@Column(nullable = false, unique = true)
+	private String serialId;
+
+	SocialAuthProvider provider;
+
+	@Getter
+	@ManyToOne
+	@JoinColumn(name = "user_id", nullable = false)
+	private User user;
+
+	public static UserOAuthCredential recordKAKAOCredential(User user, String serialId) {
+		return new UserOAuthCredential(null, serialId, KAKAO, user);
+	}
+}

src/main/java/slvtwn/khu/toyouserver/domain/UserOAuthCredentialRepository.java

@@ -0,0 +1,8 @@
+package slvtwn.khu.toyouserver.domain;
+
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserOAuthCredentialRepository extends JpaRepository<UserOAuthCredential, Long> {
+	Optional<UserOAuthCredential> findBySerialId(String serialId);
+}