diff --git a/backend/internal/domain/auth_models.go b/backend/internal/domain/auth_models.go
index 89992130..cc24e903 100644
--- a/backend/internal/domain/auth_models.go
+++ b/backend/internal/domain/auth_models.go
@@ -2,13 +2,13 @@ package domain
 
 type EnchantedLinkInitRequest struct {
 	LoginID string `json:"loginId"`
-	URI     string `json:"uri,omitempty"` // Redirect URI (optional for polling flow)
+	URI     string `json:"uri,omitempty"`    // Redirect URI (optional for polling flow)
 	Method  string `json:"method,omitempty"` // "email" or "sms"
 }
 
 type EnchantedLinkInitResponse struct {
-	LinkID     string `json:"linkId"`
-	PendingRef string `json:"pendingRef"`
+	LinkID      string `json:"linkId"`
+	PendingRef  string `json:"pendingRef"`
 	MaskedEmail string `json:"maskedEmail"`
 }
 
@@ -30,4 +30,4 @@ type QRInitResponse struct {
 	QRCode     string `json:"qrCode"` // Base64 or URL
 	PendingRef string `json:"pendingRef"`
 	ExpiresIn  int    `json:"expiresIn"`
-}
\ No newline at end of file
+}
diff --git a/backend/internal/domain/models.go b/backend/internal/domain/models.go
index 49ecccf8..d1962ceb 100644
--- a/backend/internal/domain/models.go
+++ b/backend/internal/domain/models.go
@@ -6,14 +6,14 @@ import (
 
 // AuditLog represents a single audit event
 type AuditLog struct {
-	Timestamp   time.Time `json:"timestamp"`
-	UserID      string    `json:"user_id"`
-	EventType   string    `json:"event_type"` // e.g., "login_success", "login_failed", "otp_sent"
-	Status      string    `json:"status"`     // e.g., "success", "failure"
-	IPAddress   string    `json:"ip_address"`
-	UserAgent   string    `json:"user_agent"`
-	DeviceID    string    `json:"device_id,omitempty"`
-	Details     string    `json:"details,omitempty"` // JSON string or simple text
+	Timestamp time.Time `json:"timestamp"`
+	UserID    string    `json:"user_id"`
+	EventType string    `json:"event_type"` // e.g., "login_success", "login_failed", "otp_sent"
+	Status    string    `json:"status"`     // e.g., "success", "failure"
+	IPAddress string    `json:"ip_address"`
+	UserAgent string    `json:"user_agent"`
+	DeviceID  string    `json:"device_id,omitempty"`
+	Details   string    `json:"details,omitempty"` // JSON string or simple text
 }
 
 // AuditRepository defines interface for storing logs
diff --git a/backend/internal/domain/sms_models.go b/backend/internal/domain/sms_models.go
index d020db78..53956273 100644
--- a/backend/internal/domain/sms_models.go
+++ b/backend/internal/domain/sms_models.go
@@ -7,12 +7,12 @@ type SmsService interface {
 
 // NaverSmsRequest represents the request body for the Naver Cloud SMS API.
 type NaverSmsRequest struct {
-	Type          string      `json:"type"`
-	ContentType   string      `json:"contentType"`
-	CountryCode   string      `json:"countryCode"`
-	From          string      `json:"from"`
-	Content       string      `json:"content"`
-	Messages      []SmsMessage `json:"messages"`
+	Type        string       `json:"type"`
+	ContentType string       `json:"contentType"`
+	CountryCode string       `json:"countryCode"`
+	From        string       `json:"from"`
+	Content     string       `json:"content"`
+	Messages    []SmsMessage `json:"messages"`
 }
 
 // SmsMessage represents a single message to be sent.
@@ -23,10 +23,10 @@ type SmsMessage struct {
 
 // NaverSmsResponse represents the response from the Naver Cloud SMS API.
 type NaverSmsResponse struct {
-	RequestID     string `json:"requestId"`
-	RequestTime   string `json:"requestTime"`
-	StatusCode    string `json:"statusCode"`
-	StatusName    string `json:"statusName"`
+	RequestID   string `json:"requestId"`
+	RequestTime string `json:"requestTime"`
+	StatusCode  string `json:"statusCode"`
+	StatusName  string `json:"statusName"`
 }
 
 // SmsRequest represents the request body for sending an SMS.
diff --git a/backend/internal/handler/admin_handler.go b/backend/internal/handler/admin_handler.go
index 4c68e7bc..a324dfd4 100644
--- a/backend/internal/handler/admin_handler.go
+++ b/backend/internal/handler/admin_handler.go
@@ -3,9 +3,9 @@ package handler
 import (
 	"context"
 	"log/slog"
+	"net/url"
 	"os"
 	"strings"
-    "net/url"
 
 	"github.com/descope/go-sdk/descope"
 	"github.com/descope/go-sdk/descope/client"
@@ -50,7 +50,7 @@ func (h *AdminHandler) checkAuth(c *fiber.Ctx) error {
 	if adminPass == "" {
 		adminPass = "admin" // Default fallback
 	}
-	
+
 	reqPass := c.Get("X-Admin-Password")
 	if reqPass != adminPass {
 		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{"error": "Invalid Admin Password"})
@@ -59,11 +59,11 @@ func (h *AdminHandler) checkAuth(c *fiber.Ctx) error {
 }
 
 type CreateUserRequest struct {
-	LoginID     string            `json:"loginId"`
-	Email       string            `json:"email"`
-	Phone       string            `json:"phone"`
-	DisplayName string            `json:"displayName"`
-	Roles       []string          `json:"roles"`
+	LoginID     string              `json:"loginId"`
+	Email       string              `json:"email"`
+	Phone       string              `json:"phone"`
+	DisplayName string              `json:"displayName"`
+	Roles       []string            `json:"roles"`
 	Tenants     map[string][]string `json:"tenants"` // tenantId -> roles
 }
 
@@ -76,18 +76,20 @@ func (h *AdminHandler) CheckAuth(c *fiber.Ctx) error {
 
 // ListUsers - GET /api/v1/admin/users
 func (h *AdminHandler) ListUsers(c *fiber.Ctx) error {
-	if err := h.checkAuth(c); err != nil { return err }
+	if err := h.checkAuth(c); err != nil {
+		return err
+	}
 
 	text := c.Query("text")
-	// Limit is not directly supported in SearchAll options as a simple int in all SDK versions, 
+	// Limit is not directly supported in SearchAll options as a simple int in all SDK versions,
 	// but let's check the options struct.
 	// Based on previous inspection: SearchAll takes UserSearchOptions.
-	
+
 	var users []*descope.UserResponse
 	var err error
 
 	if text != "" {
-		options := &descope.UserSearchOptions{ Text: text, Limit: 50 }
+		options := &descope.UserSearchOptions{Text: text, Limit: 50}
 		users, _, err = h.DescopeClient.Management.User().SearchAll(context.Background(), options)
 	} else {
 		// Nil options means default search (usually returns all or default page)
@@ -104,13 +106,15 @@ func (h *AdminHandler) ListUsers(c *fiber.Ctx) error {
 
 // DeleteUser - DELETE /api/v1/admin/users/:loginId
 func (h *AdminHandler) DeleteUser(c *fiber.Ctx) error {
-	if err := h.checkAuth(c); err != nil { return err }
+	if err := h.checkAuth(c); err != nil {
+		return err
+	}
 
 	loginID := c.Params("loginId")
-    // Decode if necessary (Fiber usually decodes params, but let's be safe if it's double encoded)
-    if decoded, err := url.QueryUnescape(loginID); err == nil {
-        loginID = decoded
-    }
+	// Decode if necessary (Fiber usually decodes params, but let's be safe if it's double encoded)
+	if decoded, err := url.QueryUnescape(loginID); err == nil {
+		loginID = decoded
+	}
 
 	slog.Info("[Admin] Deleting user", "loginID", loginID)
 	if err := h.DescopeClient.Management.User().Delete(context.Background(), loginID); err != nil {
@@ -123,12 +127,14 @@ func (h *AdminHandler) DeleteUser(c *fiber.Ctx) error {
 
 // UpdateUserStatus - PATCH /api/v1/admin/users/:loginId/status
 func (h *AdminHandler) UpdateUserStatus(c *fiber.Ctx) error {
-	if err := h.checkAuth(c); err != nil { return err }
+	if err := h.checkAuth(c); err != nil {
+		return err
+	}
 
 	loginID := c.Params("loginId")
-    if decoded, err := url.QueryUnescape(loginID); err == nil {
-        loginID = decoded
-    }
+	if decoded, err := url.QueryUnescape(loginID); err == nil {
+		loginID = decoded
+	}
 
 	var req struct {
 		Status string `json:"status"` // "enabled" or "disabled"
@@ -161,7 +167,9 @@ func (h *AdminHandler) UpdateUserStatus(c *fiber.Ctx) error {
 
 // UpdateUser - PATCH /api/v1/admin/users/:loginId
 func (h *AdminHandler) UpdateUser(c *fiber.Ctx) error {
-	if err := h.checkAuth(c); err != nil { return err }
+	if err := h.checkAuth(c); err != nil {
+		return err
+	}
 
 	loginID := c.Params("loginId")
 	if decoded, err := url.QueryUnescape(loginID); err == nil {
@@ -213,7 +221,9 @@ func (h *AdminHandler) UpdateUser(c *fiber.Ctx) error {
 }
 
 func (h *AdminHandler) CreateUser(c *fiber.Ctx) error {
-	if err := h.checkAuth(c); err != nil { return err }
+	if err := h.checkAuth(c); err != nil {
+		return err
+	}
 
 	if h.DescopeClient == nil {
 		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "Descope Client not configured"})
@@ -247,7 +257,7 @@ func (h *AdminHandler) CreateUser(c *fiber.Ctx) error {
 		VerifiedEmail: boolPtr(req.Email != ""),
 		VerifiedPhone: boolPtr(normalizedPhone != ""),
 	}
-	
+
 	// Add Roles if provided
 	if len(req.Roles) > 0 {
 		userObj.Roles = req.Roles
@@ -278,4 +288,4 @@ func (h *AdminHandler) CreateUser(c *fiber.Ctx) error {
 		"message": "User created successfully",
 		"user":    res,
 	})
-}
\ No newline at end of file
+}
diff --git a/backend/internal/handler/auth_handler.go b/backend/internal/handler/auth_handler.go
index 55eabd09..cdf5ba97 100644
--- a/backend/internal/handler/auth_handler.go
+++ b/backend/internal/handler/auth_handler.go
@@ -55,34 +55,34 @@ func NewAuthHandler(redisService *service.RedisService) *AuthHandler {
 
 	var descopeClient *client.DescopeClient
 	var err error
-		if projectID != "" {
-			descopeClient, err = client.NewWithConfig(&client.Config{
-				ProjectID:		projectID,
-				ManagementKey:	managementKey,
-			})
-			if err != nil {
-				slog.Warn("Failed to initialize Descope Client", "error", err)
-			}
-		}
-	
-		return &AuthHandler{
-			ProjectID:		projectID,
-			SmsService:		service.NewSmsService(),
-			EmailService:		service.NewEmailService(),
-			RedisService:		redisService,
-			DescopeClient:	descopeClient,
+	if projectID != "" {
+		descopeClient, err = client.NewWithConfig(&client.Config{
+			ProjectID:     projectID,
+			ManagementKey: managementKey,
+		})
+		if err != nil {
+			slog.Warn("Failed to initialize Descope Client", "error", err)
 		}
 	}
-	
-	// SendSms sends a verification code via SMS. (Restored for completeness)
-	func (h *AuthHandler) SendSms(c *fiber.Ctx) error {
-		var req domain.SmsRequest
-		if err := c.BodyParser(&req); err != nil {
-			return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid request body"})
-		}
-	
-			slog.Info("[SMS] Sending code", "phoneNumber", req.PhoneNumber)
-			sanitizedPhone := strings.ReplaceAll(req.PhoneNumber, "-", "")
+
+	return &AuthHandler{
+		ProjectID:     projectID,
+		SmsService:    service.NewSmsService(),
+		EmailService:  service.NewEmailService(),
+		RedisService:  redisService,
+		DescopeClient: descopeClient,
+	}
+}
+
+// SendSms sends a verification code via SMS. (Restored for completeness)
+func (h *AuthHandler) SendSms(c *fiber.Ctx) error {
+	var req domain.SmsRequest
+	if err := c.BodyParser(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid request body"})
+	}
+
+	slog.Info("[SMS] Sending code", "phoneNumber", req.PhoneNumber)
+	sanitizedPhone := strings.ReplaceAll(req.PhoneNumber, "-", "")
 	rand.Seed(time.Now().UnixNano())
 	code := fmt.Sprintf("%06d", rand.Intn(1000000))
 	content := fmt.Sprintf("[Baron SSO] 인증번호: %s", code)
diff --git a/backend/internal/repository/clickhouse_repo.go b/backend/internal/repository/clickhouse_repo.go
index 4b3fe03d..e688c10d 100644
--- a/backend/internal/repository/clickhouse_repo.go
+++ b/backend/internal/repository/clickhouse_repo.go
@@ -1,12 +1,11 @@
 package repository
 
 import (
+	"baron-sso-backend/internal/domain"
 	"context"
 	"fmt"
 	"time"
 
-	"baron-sso-backend/internal/domain"
-
 	"github.com/ClickHouse/clickhouse-go/v2"
 	"github.com/ClickHouse/clickhouse-go/v2/lib/driver"
 )
@@ -25,7 +24,6 @@ func NewClickHouseRepository(host string, port int, user, password, db string) (
 		},
 		Debug: false,
 	})
-
 	if err != nil {
 		return nil, fmt.Errorf("failed to open clickhouse connection: %w", err)
 	}
diff --git a/backend/internal/service/ses_service.go b/backend/internal/service/ses_service.go
index f38b37f2..598ad517 100644
--- a/backend/internal/service/ses_service.go
+++ b/backend/internal/service/ses_service.go
@@ -1,12 +1,12 @@
 package service
 
 import (
+	"baron-sso-backend/internal/domain"
 	"context"
 	"fmt"
 	"log/slog"
 	"os"
 
-	"baron-sso-backend/internal/domain"
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/config"
 	"github.com/aws/aws-sdk-go-v2/credentials"
diff --git a/backend/internal/service/sms_service.go b/backend/internal/service/sms_service.go
index 8ebc6059..c50a739a 100644
--- a/backend/internal/service/sms_service.go
+++ b/backend/internal/service/sms_service.go
@@ -1,6 +1,7 @@
 package service
 
 import (
+	"baron-sso-backend/internal/domain"
 	"bytes"
 	"crypto/hmac"
 	"crypto/sha256"
@@ -14,8 +15,6 @@ import (
 	"strconv"
 	"strings"
 	"time"
-
-	"baron-sso-backend/internal/domain"
 )
 
 type SmsServiceImpl struct {
@@ -96,8 +95,8 @@ func (s *SmsServiceImpl) SendSms(to, content string) error {
 		slog.Error("[SmsService] error response from naver cloud sms api", "body", string(respBody))
 		return fmt.Errorf("error sending sms: status code %d", resp.StatusCode)
 	}
-    
-    slog.Info("[SmsService] sms sent successfully", "body", string(respBody))
+
+	slog.Info("[SmsService] sms sent successfully", "body", string(respBody))
 	return nil
 }
 
@@ -113,4 +112,4 @@ func (s *SmsServiceImpl) makeSignature(method, url, timestamp string) (string, e
 	}
 
 	return base64.StdEncoding.EncodeToString(h.Sum(nil)), nil
-}
\ No newline at end of file
+}