🐛 fix: 중복 사용자를 반환하지 않도록 수정

src/main/java/slvtwn/khu/toyouserver/application/UserService.java

@@ -63,6 +63,7 @@ private List<UserResponse> findAllUsersWithSameGroups(User user, String search)
                 .flatMap(List::stream)
                 .filter(each -> !each.getUser().getId().equals(user.getId()))
                 .map(each -> UserResponse.of(each.getUser(), each.getGroup().getId()))
+                .distinct()
                 .toList();
     }
 

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

@@ -8,6 +8,7 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.Table;
 import java.time.LocalDate;
+import java.util.Objects;
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
@@ -57,4 +58,17 @@ public User updateInfo(String name, LocalDate birthday, String introduction, Str
 		this.profilePicture = profilePicture;
 		return this;
 	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) return true;
+		if (o == null || getClass() != o.getClass()) return false;
+		User user = (User) o;
+		return Objects.equals(id, user.id) && Objects.equals(name, user.name);
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hash(id, name);
+	}
 }