diff --git a/internal/howmuch/adapter/repo/user.go b/internal/howmuch/adapter/repo/user.go
index 97814da..7a33bff 100644
--- a/internal/howmuch/adapter/repo/user.go
+++ b/internal/howmuch/adapter/repo/user.go
@@ -50,8 +50,8 @@ func NewUserRepository(db *sql.DB) repo.UserRepository {
 func (ur *userRepository) Create(
 	ctx context.Context,
 	transaction interface{},
-	u *model.User,
-) (*model.User, error) {
+	u *model.UserPO,
+) (*model.UserPO, error) {
 	timeoutCtx, cancel := context.WithTimeout(ctx, insertTimeout)
 	defer cancel()
 
@@ -76,7 +76,7 @@ func (ur *userRepository) Create(
 		return nil, err
 	}
 
-	return &model.User{
+	return &model.UserPO{
 		ID:        int(userDB.ID),
 		Email:     userDB.Email,
 		FirstName: userDB.FirstName,
@@ -88,7 +88,7 @@ func (ur *userRepository) Create(
 }
 
 // GetByEmail if not found, return nil for user but not error.
-func (ur *userRepository) GetByEmail(ctx context.Context, email string) (*model.User, error) {
+func (ur *userRepository) GetByEmail(ctx context.Context, email string) (*model.UserPO, error) {
 	queries := sqlc.New(ur.db)
 	userDB, err := queries.GetUserByEmail(ctx, email)
 	if errors.Is(err, pgx.ErrNoRows) {
@@ -98,7 +98,7 @@ func (ur *userRepository) GetByEmail(ctx context.Context, email string) (*model.
 		return nil, err
 	}
 
-	return &model.User{
+	return &model.UserPO{
 		ID:        int(userDB.ID),
 		Email:     userDB.Email,
 		FirstName: userDB.FirstName,
diff --git a/internal/howmuch/usecase/repo/user.go b/internal/howmuch/usecase/repo/user.go
index 5693b3a..803d1ef 100644
--- a/internal/howmuch/usecase/repo/user.go
+++ b/internal/howmuch/usecase/repo/user.go
@@ -29,6 +29,6 @@ import (
 )
 
 type UserRepository interface {
-	Create(ctx context.Context, transaction interface{}, u *model.User) (*model.User, error)
-	GetByEmail(ctx context.Context, email string) (*model.User, error)
+	Create(ctx context.Context, transaction interface{}, u *model.UserPO) (*model.UserPO, error)
+	GetByEmail(ctx context.Context, email string) (*model.UserPO, error)
 }
diff --git a/internal/howmuch/usecase/usecase/repomock/testuserrepo.go b/internal/howmuch/usecase/usecase/repomock/testuserrepo.go
index 480cfb5..b776ddd 100644
--- a/internal/howmuch/usecase/usecase/repomock/testuserrepo.go
+++ b/internal/howmuch/usecase/usecase/repomock/testuserrepo.go
@@ -37,8 +37,8 @@ type TestUserRepository struct{}
 func (tur *TestUserRepository) Create(
 	ctx context.Context,
 	transaction interface{},
-	u *model.User,
-) (*model.User, error) {
+	u *model.UserPO,
+) (*model.UserPO, error) {
 	user := *u
 
 	user.ID = 123
@@ -50,11 +50,11 @@ func (tur *TestUserRepository) Create(
 	return &user, nil
 }
 
-func (ur *TestUserRepository) GetByEmail(ctx context.Context, email string) (*model.User, error) {
+func (ur *TestUserRepository) GetByEmail(ctx context.Context, email string) (*model.UserPO, error) {
 	hashedPwd, _ := bcrypt.GenerateFromPassword([]byte("strongHashed"), 12)
 	switch email {
 	case "a@b.c":
-		return &model.User{
+		return &model.UserPO{
 			ID:       123,
 			Email:    "a@b.c",
 			Password: string(hashedPwd),
diff --git a/internal/howmuch/usecase/usecase/user.go b/internal/howmuch/usecase/usecase/user.go
index 53fc549..24adb8e 100644
--- a/internal/howmuch/usecase/usecase/user.go
+++ b/internal/howmuch/usecase/usecase/user.go
@@ -82,7 +82,7 @@ func (uuc *userUsecase) Create(ctx context.Context, u *model.UserCreateDTO) (*mo
 	data, err := uuc.dbRepo.Transaction(
 		ctx,
 		func(txCtx context.Context, tx interface{}) (interface{}, error) {
-			created, err := uuc.userRepo.Create(txCtx, tx, &model.User{
+			created, err := uuc.userRepo.Create(txCtx, tx, &model.UserPO{
 				Email:     u.Email,
 				Password:  u.Password,
 				FirstName: u.FirstName,
@@ -113,7 +113,20 @@ func (uuc *userUsecase) Create(ctx context.Context, u *model.UserCreateDTO) (*mo
 		return nil, err
 	}
 
-	user := data.(*model.User)
+	userPO := data.(*model.UserPO)
+
+	user := &model.User{
+		ID:        userPO.ID,
+		Email:     userPO.Email,
+		Password:  userPO.Password,
+		FirstName: userPO.FirstName,
+		LastName:  userPO.LastName,
+
+		EventIDs: []int{}, // Unfilled
+
+		CreatedAt: userPO.CreatedAt,
+		UpdatedAt: userPO.UpdatedAt,
+	}
 
 	return user, nil
 }