diff --git a/internal/user/service.go b/internal/user/service.go
index 068f21c..daa9c03 100644
--- a/internal/user/service.go
+++ b/internal/user/service.go
@@ -6,7 +6,7 @@ type Service struct {
 	store UserCRUD
 }
 
-func NewService(store UserCRUD) (UserCRUD, error) {
+func NewService(store UserCRUD) (*Service, error) {
 	if store == nil {
 		return nil, fmt.Errorf("store is nil")
 	}
@@ -19,12 +19,8 @@ func (s *Service) Create(user *User) error {
 	return s.store.Create(user)
 }
 
-func (s *Service) GetByID(id int64) (*User, error) {
-	return s.store.GetByID(id)
-}
-
-func (s *Service) GetByUsername(username string) (*User, error) {
-	return s.store.GetByUsername(username)
+func (s *Service) GetBy(by, value string) (*User, error) {
+	return s.store.GetBy(by, value)
 }
 
 func (s *Service) Update(user *User) error {